《一元一次方程》解方程题大全新课标人教版七年级上册(1)

1、一元一次方程解方程题大全新课标人教版七年级上册1 .解下列方程2x + l = 2-x(写出检验过程)上=2_134-72v =-11 一 3(8 x) = -2(15 - lx).34322.解下列方程：(1) 10(x-l) = 5 ;/q 7x 1 5x +1 3x + 2 丁-丁 = 2-；(3) 2(y + 2)-3(4y-l) = 9(l-y)；(4)0.8 9x 1.3-3x 5x +11.20.2 0.3 3 .解下列方程：(l)70%x+ (30-x) X 55%=30X 65%;(4) 4(2y + 3) = 8(1 -y)-5()，一2).2x-l 10x-l _ 2x+

2、3640.8x + 0.9 x + 5 0.3x-0.2=H0.520.34 .解方程5(x + 8) = 6(2a- -7) + 5-+? - = 1465 .解方程吆二+2空：=i0.30.46 .解方程：(l)7-2x=3-4x(2)4 (Lx) =x-l7.(3)2(y+2)-3(4y-l)=9(l-y)解方程:x 3 2x +13=1(4) 3(2X4.1) 2(2x4)8.解答题-2x+l=13113-x-(x-l) = -(2x + l)9.解方程 3(x-2)=2-5(x-2);10. 解方程(l)70%x+(30-x)X55%=30X65%x 5x +112x 4 /o112

3、 j- = +(3) 2a- X-(x-l) =-(A-1) ； (4)2 o32L 23x 4 c - x 3_ Z.j =0.20.0511. 解方程2x + = 2-x20. 5-3(y-1) = 22y-l y + 2L7-2x x-：= - 1 = 1340.30.712. 解方程(1) 3x _ 2 = _5(x + 2) ； (2) 2(y + 2)-3(4y-l) = 9(l-y)(3) 尸 11 =2(4) 15%产10-尸 10X32%13. 解下列方程(1) 2(x-2)-3(4x-1) = 9(1-a);(2) ”；63(4)x + 40.214. 解方程(l)70%x

4、+ (30-x) X55%=30X65%x 5x + l I . 2x-4(2)-= 1 + 263(3) 2xx-i-(x-l) =|(a -1)；(4)x 4-2.5 =0.2x-300515. 解下列方程：It,GJ Q9 3Q 5y-l 7 A 3-x x-41. 5x + 2/ x - 8a-8 134563235. 2(x-2)-3(4x-l)=9(l-x)6.一 116. 解方程：2(x-1)=41(1x-1)-1 = 12 21-3(8-,v) = -2(15-2a)= += 2231 12-X- -(3-2x) = 1-x = - x+ 152519x 25 3x = 8x

5、+ lx2 = 02617.解下列方程(l)7x+6=8-3x(2)4x-3(20-x)=6x-7(9-x) 1 + L = J_(5) 5-3(y-) = 2_L + 9 = 73 623418. 解方程(1)2x+5=5x-7(2)4x-3 (20-x)+4=0(4)4.v 1.5 5x 0.8 1.2 x=+ 30.50.20.119. 解下列方程:x + 3 4 + x一- 54x-1.50.55x 0.8 1.2 x o=+ 30.20.120. 解方程：(1) " -1 =十一 ")' + 1 ; (2) 2(2x-l) = 2(l + x) + 3(x

6、+3).41221. 解方程3x-2 = -5(x+2)2(y + 2) - 3(4y -1) = 9(1 - y)I 2尸1 =215%a+10-a=10X32%22. 解方程,-2|+k- 3| = 1.23. 解方程tl_x+5 =空-二 53224. (一)解方程1、2x+5=5x-72、3 &-2) =2-5 &-2)25. 解方程r . 7 ? 丫 _ a 5(x + 8) = 6(2x -7) + 5(2)-=14626. 解方程：-3x+2x=5T27. 解下列方程,.4 = 2 5x.= E64 _(x_3) = 3(2_5x).4x-3(20-x) = 5x

7、-7(20-x)28.解下列方程3 x x 8=1231 -x x + 2 1x -=-13(x + l) - 2(x + 2) = 2x + 3x+1 x+3 ”=jO0.2 0.0129. 解方程1、10(x l) = 57x-l 5x +1 c 3x + 2=23243、2(y + 2)-3(4y-l) = 9(l-y)0.8 - 9x 1.3-3x _ 5x + l1.20.2 0.330. 解方程1 - 3(8-x) =-2(15-2x)1.7 - 2x _ x 0.307-r31. 解下列方程：(l)5(x+7) = 4x+34;Alz!_2 + r£±i =

8、3(x-l) 325x-4 6x + 21 =1.35解方程32.(1) 4(2x-l) = l-2(x-6)(2) -2 = 25(3) 2x + l_().5-l =_0.30.6/八 2x + l / _、 3x + 4- x-2(4) (x-5) = -(5)x + 5 =325233.解方程:(1) 2x+5 = - ；(2) -6x = 1 ;(l)3x-7+4x=6x-2(2) 5x-2 = 6x-3 ；9x 5 = 2x + 23®5x + 2 = 2x + 1434. 解方程:(1) 2x + 5 = 3(x-l);x-3 x+4 0.235. 解下列方程X2x-3

9、=x+l-2 (-5) =8 2x-3 4x +1 t x-3 x + 4-= -250.50.236. 解下列方程:3x=6(5-2x)2(x-2)-3 (4xl)=9(lx)8x+7+2x=l+llx-60x-3 x+4 ,一-= l.o0.50.2x-1 2x + 3亍一如 .3) = 2弓(一)37. 解下列方程(1) 4x-3(20-x) = 5x-7(20-x)2x 1 2x 33 - 4=1 2x _ 1.6 - 3x _ 31x + 8；03" 0.63-0.63(D + 2(x + l) = -6x-1 t x+=1 +3x-7+4x=6x-239. 解方程(1) 2x + = 2-x(2) 5-3(y-1) = 3汩+ 二上 342x-l5x-l40. 解下列方程:x - 3 (x+2)= - 541. 解下列方程x 4 = 2 5x,= ± 一 (x