2013年中考数学一元一次方程不等式试题汇编

162013; 7405550730505 055 1 263080 ; 1xy 7405550 ; 7305055; 2a80- a80 630808a 680- a630 1x y A86; 2a80-a 80a75 a= 75,80-75 = 5 a= 76,80-a = 4 a= 77,80-a = 3 a= 78,80-a = 2 a= 79,80-a = 1 a = 80,80-a = 0 172013;20134207.0 B16 266169 1810;B 1611 1 21500; B1,2001 ; 116- x x; 21 ; 1xB16-x X5 getx7 5x7 x x = 567 1A5B11; 2A6,10; 3A7B9; 211xB16- xy y = 1500x 120016-x = 300x 19200 300u003e 0 x = 5y Y= 3005 19200 = 20700; 2x = 5,16-5 = 11 51500 111200 = 20700; x = 6,16-6 = 10 61500 101200 = 21000; x = 7,16-7 = 9 71500 91200 = 21,300; A1 20700 182013;- 105,70040 250028003000b 3200123200x y 1; 2yx 32b 500 b ; 1xb40- x105,700123200 ; 2 - b ; 1a2b2c 1abc 1xb40- x 21x24 x x = 21,22,23,24 121b19; 222b18; 32 3b17; 424b16; 2 Y =3000-25003200-280040-x = 500x 16000-400x = 10016000 k= 100u003e 0 yx x = 24y max = 18400 3bbc 2500a 2800b 500c = 18400 C = a2b2c1abc 184-25a-28bu003e 05.cab a = 2b = 2,184-25a-28b = 78 a = 2b = 3,184-25a-28b = 50c = 10; a = 3b = 2,184-25a-28b = 53 a = 3b = 3,184-25a- 28b = 25c = 5; a = 3b = 4,184-25a-28b = -2 a = 4b = 3,184-25a-28b = 0 12b310 23b35 192013 80 300?400400?500500?600600?700700?900 . 3060100130150 . 300?400 300400 400320400?1 - 80?30= 110 11000 2800226 11000800 1000?1 - 80?150= 350 2 2x 80xx64625625?1 61485; 80?60= 185 lt; 226; 500 lt; 8064006251-80100 x 600 lt; 80480080750 lt; x 48 750 an1 - 80?130= 280 226 800226 630 8 202013;AB 10010090;B50 5095x Xu003e100 1 130290 . x 127 . B126 . 2xAB 3100 ; 37186?84 1100290-1000.950290- 500.95x; 20.95x 2.5,0.9x10; 30.95x 2.50.9x 10 1100290-1000.9 = 271 100290-100x 0.9x = 0.9x10; B50290-500.95 = 278 50290-50x 0.95x = 0.95x 2.5; 2 0.910 = 0.952.5 x = 150 x = 150AB 30.910 lt; 0.952.5 xu003e 150 0.910 0.952.5 x u003c150 Yb = 0.95x 501-95= 0.95x 2.5; 150 ; 100150B 212013; 10360 10 1 290 -610360365 ; 1x0.9x 10 ; 2y90- y360365 1x0.9x 10 = x = 4 x = 4- A4 2y90-y 36040.9y 60.990-y365 67y70 x 68,69,70 16822; 26921; 37020; 223-3; 20131 0 -35000 125000 1 2303