小学总复习解方程专项练习200题(有答案)

解方程专项练习200题(有答案)

解方程专项练习200题(有答案)

(1)X-=,

(13)0.6x+90%x=78,

(2)xXX=,

(14)20%x-2.4X3=0.8,

(3)-4x=,

(15)x-x=42,

(4)8X2.5-2x=13.6

(16)0.6x+3X2.5=67.5,

(5)0.78：x=3：5,

(17)14-(x-0.45)=5,

(6)1-20%x=0.4,

(18)x-2.25=8.25,

(8)14-(x-)=6,

(19)：x=3：12,

(9)2x-x=l.2,

(20)x+0,8=5.6,

(10)9X3-1.7x=13.4,

(21)1.4：x=l：0.75,

(11)x-25%x=24,

(12)x-+0.2=,

(22)xX(2-)=241

(35)4x-3X9=29,

(23)4x-=3,

(36)16+8x=40,

(24)12x+7X0.3=20.1,

(37)x4-l.1=3,

(25)K+X=,

(38)+2x=,

(26)x：42=,

(39)X3-7x=1.04,

(27)X0.5+x=,

(40)x-1-x=2,

(28)0.8：=0.48：x,

(41)x-x=14,

(29)x-x=,

(42)3x-x=,

(30)42：=x：

(43)=,

(31)5x-0.4=75%,

(44)1.2：=,

(32)6x0.9=4.5,

(45)=：,

(33)2(x-3)=5.8,

(46)：=x：0.8,

(34)1.6x=6.4,

(47)x=+l,

2/21

(60)34-(X-)=1.3

(48)I-25%X+25%x=+25%x,

(61)(X+0.5)：2=(X-4):,

(49)，

(62)X-rO.05=3.528,

XX=,

(50)

(63)2X-4X6=80,

(51)5：8=x：32,

(64)4X4.5-3X=6.38,

(65)4X-7.2=10,

(52)2x+3X0.9=24.9,

(66)11.5X+X=20,

(53)5.3x-2.9x=,

(54)X(7-2.8x)=1.5,

(67)3.8X12+15X=87.6,

(55)x：0.3=:,

(68)6X+5=17,

(56)□150%x+66=99

(69)0.6X(2.5+X)=4.2,

(57)x+6-0.8x=16

(70)：=X：,

(58)

(71),

(59)

(72)

3/21

(84)

(73),

(85)5(3x-4)-2(x-1)=5(2x-1)

(86)=,

(74)4(+x)=,

(87)8(2X-7)=5(X+13),

(75)X0.25+x二，

(76)x-,(88)3(x+4.5]=60,

(77)200：6=x：,

(89)1.6x+2.4=7.52,

(78)4-i-X=,

(90)3(x-0.8)=6.3,

(79)8(x-2)=2(x+7),

(91)28.4-5x=5.8,

(80)：18%=,

(92)x：=

-2x=,

(81)

(93)+2x=,

x+x=46,(94)x=15%,

(82)

(95)x-x=,

(83)：x=：,

(96)x+50%x=6,

4/21

(97)：x=0.3：12,(109)4X4.5-3x=6,

(98)4x+2(8-x)=26,(110)=,

(99)x-=0,(111)6X3-1.8X=7.2,

(100)+x=l,(112)4-x=,

(101)xX(+)=,(113)x+=42,

(102),(114)x+=,

(103),(115)7x4-3=8.19,

(104)x-,(116)12：0.6=x：,

(105)xX,(117)3(x+2)=4(x+1),

(118)3x70%x=9.2,

(106)5x+35=650,

(119)6+x=240,

(107)7204-3x=80,

(120)22.5-0.4x=12.5,

(108)3.6x-0.9x=8.1,

5/21

(121)x：3.5=4：2,

(134)：=：(4-x),

(122)x-0.8x-6=16,

(135)6x+31=49,

(123)：=x：8,

(136)7x4-3=8.19,

(124),

(137)32.8-9x=17.5,

(125)x：15=：,

(138)x-0.36x=16,

(126)x+x=,

(139)6X7+3x=69,

(127)xX50%-x=5,

(140)6x+2x-56=0,

(128)1-x=,

(141)3x-0.45X4=2.7,

(129)2.5+lx=3,

(142)5.8x-4.6x=0.96,

(130)3x2=4,

(131)8.5-3x=2,(143)8.4-r(9-x)=3,

(132)3+x=4,

(144)3x4-1.2=8,

(133)x-5%=17.54,

6/21

(145)5x+28=71,

(157)X-7.65=4.64,

(146)8.7-L2x=3.9,

(158)28.25-X=8.25,

(147)8x-2.6x=37.8,

(159)X-(3.6+2.97)=12.42,

(148)0.75x-0.95X4=8.5,

(160)4-x=,

(149)544-2+3x=72,(161)14.5=5.5,

(162)x-80%x=48,

(150)8x-2.6=37.8,(163)75%x-5X=6,

(164)x-6.8=15.4,

(151)x4-=,

(165)1.9x=5.7,

(152)x+30%x=26,

(166)4.3y-y=4.6,

(153)7.8-3x=3.6,

(167)5xi2.6=7.6,

(154)6X3-L8x=7.2,

(168)x-1.5=12.9,

(155)10：x=4.5：0.8,

(169)9x+5x=8.4,

(156)：=x：,

7/21

(170)6.8+3.2x=14.8,

(184)9.6+3x=3.24X5,

(171)5+x二，

(185)2x+5=5x-7,

(172)-x=,

(186)3(x-2)=2-5(x-2),

(173)4.5X-3x=1.5,

(174)(1+25%)x=0.5,(187)4x-3(20-x)+4=0,

(175)x-40%x=9,(188)-=1,

(189)4x-5X6=12,

(176)xX20%=15.2,

(190)8x-3x=15.6,

(178)x-x=,

(191)30X(x+4)=60,

(179)x4-75%=3,

(180)4x-,(192)7.2X0.5-3x=1.2,

(181)：x=：4.5,(193)5x-2.4X5=8,

(182)(x-4.5)X6=12.5,(194)+x=X2,

(183)27-17x=13.4,(195)5x+2.4X15:66,

8/21

(196)3.2x+2.8x-x=l,

(197)2.5X16-8x=12,

(198)9.6-3x=6.3,

(199)5(x+6)=75,

(200)x+0.7+0.9X3=4,

9/21

6x4-6=44-6,

x=

(9)2x-x=1.2,

x(2-)=1.2,

x=1.2,

x4-=l.24-,

x=l；

(10)9X3-1.7x=13.4,

27-1.7x=13.4,

27-1.7x+1.7x=13.4+1.7x,

答案：

13.4+1.7x=27,

(1)x-=,13.4+1.7x-13.4=27-13.4,

-91.7x=13.6,

91.7x4-1.7=13.64-1.7,

X=;x=8

(11)x-25%x=24,

⑵xXX=,75%x=24,

X=,75%x4-75%=24-r75%,

xX21=X21,x=32；

x=12；

(12)x-+0.2=,

(3)-4x=,x-0.6=,

-4x+4x=+4x,x-0.6+0.6=+0.6,

=+4x,x=,

+4=4x+4,X-r=-r,

x=.X=1

(4)8X2.5-2x=13.6

20-2x=13.6,

13.6+2X=20,(13)0.6x+90%x=78,

2X=6.4,1.5x=78,

x=3.2；1.5x4-1.5=784-1.5,

(5)0.78：x=3：5,x=52；

3x=0.78X5,

3x=3.9,(14)20%x-2.4X3=0.8,

x=l.320%x-7.2=0.8,

(6)1-20%x=0.4,20%x-7.2+7.2=0.8+7.2,

120%xi20%x=0.4i20%x,20%x：20%=8：20%,

0.4+20%x=l,x=40；

0.4+20%x-0.4=1-0.4,

20%x=0.6,(15)x-x=42,

20%xX=0.6X,x=42,

x=3；x+=42+,

⑻1-i-(x-)=6,x=252

14-(x-)X(x-)=6X(x-),(16)0.6x+3X2.5=67.5,

1=6X(x-),0.6x+7.5=67.5,

6x-6X=l,0.6x+7.5-7.5=67.5-7.5,

6x-3=1,0.6x=60,

6x=4,0.6x-r().6=60+0.6,

10/21

x=100；

□(27)X0.5+x=,

0.75+x=3.75,

(17)14-(x-0.45)=5,0.75+x-0.75=3.75-0.75,

-r(x-0.45)X(x-0.45)=(x-0.45),x-3,

x-2.4=1.6,x4-=34-,

x-2.4+2.4=1.6+2.4,x=6；

x=4,

(28)0.8：=0.48：x,

0.8x=X0.48,

x=0.8x=0.2,

(18)x-2.25=8.25,0.8x-r0.8=0.24-0.8,

x-2.25+2.25=8.25+2.25,x=

x=10.5；(29)x-x=,

(19)：x=3：12,x=,

3x=X12,x=,

3x4-3=94-3,x=3；

x=3

(20)x+0.8=5.6,(30)42：=x：

x+0.8-0.8=5.6-0.8,x=42X,

x=4.8,x=30,

xX=4.8X,x=50；

x=8.

(21)1.4：x=l：0.75,(31)5x-0.4=75%,

x=1.4X0.75,5x-0.4+0.4=75%+0.4,

x=1.055x-r5=l.154-5,

(22)xX(2-)=24,x=0.23

xX=24,

xX3=24+,

x=20；(32)6x-0.9=4.5,

(23)4x-=3,6x-0.9+0.9=4.5+0.9,

4x-+=3+,6x=5.4,

4x=4,6x+6=5.4+6,

4x4-4=44-4,x=0.9；

x=l

(24)12x+7X0.3=20.1,(33)2(x-3)=5.8,

12x+2.1=20.1,2(x-3)+2=5.8+2

12xi2.12.1=20.12.1,x3=2.9,

12x4-12=184-12,x-3+3=2.9+3,

x=l.5；x=5.9；

(25)x+x=,(34)1.6x=6.4,

x=,1.6x4-1.6=6.44-1.6,

xX,x=4；

x=；(35)4x-3X9=29,

(26)x：42=,4x-27=29,

10x=42X,4x-27+27=29+27,

I0x+10=30+10,4x=56,

x=34x4-4=564-4,

x=14；

11/21

(36)16+8x=40,x=X0.8,

16+8x-16=40-16,x=0.04,

8x=24,x=0.2；

8x4-8=244-8,(47)x=+l,

x=3；xX=X,

(37)x4-l.1=3,x=l

x4-l.1X1.1=3X1.1,(48)□1-25%X+25%x=+25%x,

x=3.30.25x+0.25-0.25=1-0.25,

(38)+2x=,0.25x=0.75,

+2x=,x=3；

2x=,

(49)'

2x+2=+2,

x=;0.25x=1.25X1.6,

(39)X3-7x=1.04,0.25x4-0.25=1.25X1.64-0.25,

2.16-7x=1.04,x=8；

2.16-7x-1.04=1.04-1.04,XX=,

1.12-7x=0,(50)

7x4-7=1.124-7,XX-r=,

x=0.16；X=;

(40)x-1-x=2,(51)5：8=x：32,

x-1=2,8x=5X32,

x-1+1=2+1,8x4-8=5X324-8,

x=3,x=20

x=3,(52)2x+3X0.9=24.9,

x=18；2x+2.7=24.9,

(41)x-x=14,2x+2.7-2.7=24.9-2.7,

x=14,2x4-2=22.24-2,

x=14,x=ll.1；

x=18；(53)5.3x-2.9x=,

(42)3x-x=,2.4x=,

x=,2.4x4-2.4=4-2.4,

x=,x=;

x=；(54)X(7-2.8x)=1.5,

(43)=,X(7-2.8x)=1.5,

2.4x=72X0.26,7-2.8x=2.1,

2.4x=18,72,7-2.8x+2.8x=2.1+2.8x,

2.4x4-2.4=18.72+2.4,7-2.1=2.1+2.8x-2.I,

x=7.8；4.9：2.8=2.8x：2.8,

(44)1.2：=,x=l.75；

x=1.2X5,(55)x：0.3=：,

x=6,x=0.3X,

x=6,x=,

x=9；x=

(45)=：,(56)C150%x+66=99

x=18X,1.5x+66=99

x=,1.5x=33

x=,x=22

x=12；(57)x+6-0.8x=16

(46)：=x：0.8,0.2x@16

12/21

0.2x=10(67)3.8X12+15X=87.6,

x=5045.6+15X=87.6,

(58)45.6+15X-45.6=87.6-45.6,

15X=42,

x=14.415X4-15=424-15,

(59)X=2.8

0.55x=5.5(68)6X+5=17,

x=106x+5-5=17-5,

(60)3-r(X-)=1.36x4-6=124-6,

34-(X-)X(x-)=1.3X(x-),x=2；

3=1.3x-0.78,

3+0.78=1.3x-0.78+0.78,(69)0.6X(2.5+X)=4.2,

4.68=1.3x,0.6X[2.5+X)4-0.6=4.24-0.6,

4.684-1.3=1.3x4-1.3,2.5+x=7,

x=3.6；2.5+x-2.5=7-2.5,

(61)(X+0.5)：2=(X-4)：,x=4.5；

X(x-4)=(x+0.5)X,

x-X4=x+X0.5,(70)：=X：,

x-10-x=x+x,x=X,

2.25x-10+10=0.125+10,X-r=,

2.25x4-2.25=10.1254-2.25,x=0.6

x=4.5

(62)X-rO.05=3.528,

X4-0.05X0.05=3.528X0.05,(71),

X=0.1764；

(63)2X-4X6=80,

2X-24=80,(72)

2X-24+24=80+24,

2X=104,

2X4-2=1044-2,

X=52；

(64)4X4.5-3X=6.38,

18-3X=6.38,(73),

18-3X+3X=6.38+3X,

6.38+3X=18,

6.38+3X-6.38=18-6.38,

3X=11.62,(74)4(ix)=,

3X4-3=11.624-3,+4x=,

X=；+4x-=-,

(65)4X-7.2=10,4x=4,

4X-7.2+7.2=10+7.2,x=l；

4X=17.2,(75)XO.25+x=,

4X4-4=17.2-r4,0.2+x=,

X=4.3；0.2+x-0.2=-0.2,

(66)11.5X+X=20,x=,

12.5X=20,x=

12.5X4-12.5=20+12.5,

X=1.6；(76)x-,

13/21

1.6x=12.8,

1.6x4-1.6=12.84-1.6,

X=;x=8

(77)200：6=x：,(85)5(3x-4)-2(x-1)=5(2x7)

6x=200X,15x-20-2x+2=10x-5,

6x+6=480+6,13x-18=10x-5,

x=8013x-18-10x=10x-5-lOx,

3x-18=-5,

(78)44-X=,3x-18+18=-5+18,

4-rXXX=X,3x=13,

X=4,3x^3=134-3,

X・=4彳，x=;

X=10；(86)=,

3(6x-1)=64,

(79)8(x-2)=2(x+7),18x-3=64,

8X-16=2X+14,18x-3+3=64+3,

6X-16=14,18x=67,

6X=30,18x^-18=674-18,

X=5：x=

(87)8(2X-7)=5(X+13),

(80)：18%=,16x-56=5x+65,

X=0.18X6.5,16x-56-5x=5x+65-5x,

X=l.17,1lx-56:65,

X=7.8