人教版七年级数学上册第三单元一元一次方程复习题精选73.docx

1、人教版七年级数学上册第三单元一元一次方程复习题精选73一、解方程。 9 xx56 x5x4 2 x2.5x3x9.5x20816 9x x 20 2x3.5x20.512 4 x31315x 3x9.5x9 9 x7x8 x46x5 8 3 5 x7x x5.5x5x122 4 x9x5x3 y9y4.5y6 1.5y3y7y1610 4x5x3 y26y6 9x(9x5)3x4(x9) 9 5 7 bbb47 9x2(x6)35(x7)4 8 8 4(x5)4x 6x3(6x6)53(x3) 72(x1)72(16.5x) 5(x9)8x 1 1 9(x4)5x8(x2) y47y4 3 2

2、 x3 3x 52 x7.5x12 5 2 x4 4x3 3x5 5(x8)5x 6 6 一、解方程。 9 3xx59 6x9x3 8 7x11.5x4x17.5x10846 7x x 4 x3.5x9498 2 7x4718x 5x0.5x20 5 x1x6 x28x5 2 3 9 x5x 6x7.5x7x198 4 13x6x9x6 y10y9y2 y7.5y5.5y137 4x2x5 y86y6 6x(6x1)5x2(x4) 3 5 5 bbb87 8x4(x6)95(x4)8 2 8 2(x2)2x 4x4(4x2)83(x5) 92(x10)28(43.5x) 2(x3)3x 1 1

3、 3(x5)2x5(x1) y29y6 3 2 x2 4x 32 x7.5x5 5 2 x3 4x1 6x5 3(x1)9x 3 3 一、解方程。 1 7xx48 8x6x2 8 x16.5x6x4.5x25889 9x x 11 2x7.5x30.522 8 2x3616x 9x6.5x19 9 x4x2 5x37x4 8 5 9 x3x 7x1.5x6x112 8 6x3x6x14 y6.5y7.5y11 y5.5y3y64.5 2x5x2 3y22y3 5x(4x4)9x2(x1) 9 9 5 bbb26 9x4(x3)35(x6)4 4 2 5(x3)7x 2x4(3x7)44(x2)

4、 22(x3)38(65x) 4(x8)8x 1 1 2(x6)2x4(x2) y37y7 2 4 x1 2x 23 2x3.5x4 2 4 x3 3x3 4x4 4(x2)7x 2 3 一、解方程。 7 xx38 x8x2 8 5x18.5x9x5.5x15281 5x x 1 x1.5x2398 8 2x7716x 4x1.5x19 7 x1x4 x38x8 8 3 1 x8x x3.5x8x158 8 3x3x7x2 4.5y3y2y9 y7.5y5.5y49.5 x2x6 3y79y8 3x(6x7)8x5(x9) 1 5 3 bbb47 9x5(x8)42(x7)8 2 2 5(x6

5、)2x 5x3(3x4)52(x2) 93(x5)22(46x) 4(x3)7x 1 1 4(x5)2x8(x9) 8y94y4 2 4 x3 1x 65 3x7.5x11 2 6 x3 3x1 5x3 2(x1)8x 3 4 一、解方程。 3 2xx28 x8x5 8 5x18.5x3x13.5x10261 7x x 20 3x5.5x7442 2 5x61415x 6x3.5x6 3 x7x3 x26x2 2 1 3 x4x x6x3x132 8 x4x3x14 7.5y8y6y13 5.5y8.5y6.5y158 x4x9 y77y3 7x(9x10)4x5(x6) 7 1 1 bbb2

6、5 2x5(x2)93(x3)8 2 8 5(x5)8x 4x3(2x5)54(x5) 83(x1)58(17.5x) 3(x3)7x 1 1 8(x2)5x2(x9) y66y6 6 4 x1 2x 43 x5.5x16 2 5 x4 3x4 5x2 5(x5)4x 3 5 一、解方程。 5 xx27 4x7x4 2 x13.5x8x11.5x351083 7x x 18 x2.5x6144 8 8x81312x 9x2.5x16 7 x2x5 2x27x8 2 1 3 x6x x2x8x162 8 18x4x5x5 y1.5y9y11 y8y4.5y147.5 2x7x9 y42y5 7x

7、(5x7)5x4(x1) 5 7 1 bbb21 4x2(x7)23(x1)2 8 4 2(x7)6x 4x4(5x1)33(x9) 32(x4)32(91.5x) 4(x2)9x 1 1 4(x4)4x7(x5) y84y5 6 4 x1 1x 34 5x8.5x13 2 4 x1 2x4 7x6 4(x2)9x 5 5 一、解方程。 7 xx46 x7x3 8 x11.5x9x12.5x25826 3x x 20 3x5.5x90.514 8 9x91520x 8x2.5x12 1 x9x9 3x88x8 4 9 5 x4x 3x3.5x7x184 2 16x9x7x6 9.5y9y4y1

8、0 y4y6.5y52.5 4x4x4 9y92y9 8x(3x10)5x4(x5) 7 9 9 bbb87 5x4(x9)12(x3)2 4 2 2(x5)2x 5x4(2x5)64(x2) 32(x3)68(47x) 4(x9)6x 1 1 2(x2)4x6(x6) y54y6 2 2 x4 1x 55 9x3.5x11 4 5 x3 4x4 6x5 3(x2)7x 6 4 一、解方程。 7 9xx19 x9x7 2 8x19.5x4x17.5x40457 9x x 15 x7.5x4312 2 4x31918x 2x7.5x11 3 x2x6 4x96x7 8 9 1 x9x 2x4x5

9、x134 2 6x5x6x8 y5.5y7y13 7.5y8y6.5y149 x7x9 5y64y7 9x(9x1)2x2(x9) 7 5 9 bbb25 2x5(x1)64(x9)8 4 4 5(x5)4x 3x2(3x6)62(x7) 52(x3)44(73x) 3(x3)6x 1 1 6(x1)2x9(x7) y74y3 2 3 x3 3x 52 x0.5x2 4 6 x3 3x4 6x3 3(x1)2x 5 2 一、解方程。 7 4xx18 x8x7 8 7x10.5x8x2.5x40236 3x x 12 3x2.5x42.588 8 x81716x x3.5x7 9 x2x7 5x

10、66x1 8 3 7 x6x 5x9x6x154 8 11x9x3x7 5y5.5y5y2 7.5y10y4y155.5 6x3x7 y64y4 2x(7x10)8x4(x8) 5 5 5 bbb84 7x4(x5)24(x9)4 4 8 5(x9)9x 4x2(5x6)92(x2) 74(x10)68(67x) 5(x7)2x 1 1 2(x6)3x6(x4) 4y23y8 5 4 x1 3x 51 x0.5x16 2 5 x1 3x2 9x6 2(x6)2x 6 6 一、解方程。 5 xx48 x3x7 8 x14.5x2x10.5x30841 7x x 15 7x5.5x92.598 4

11、 2x91112x 2x8.5x20 3 x6x8 x47x5 2 7 1 x2x x5.5x4x138 8 15x2x5x7 7.5y7.5y9y14 y4y2.5y77.5 x6x9 y44y7 2x(5x4)8x2(x6) 7 1 7 bbb48 6x2(x7)25(x5)8 4 4 5(x6)9x 5x2(4x1)83(x3) 53(x10)78(92x) 3(x9)9x 1 1 7(x6)3x6(x7) y64y8 4 2 x2 2x 61 x7.5x19 2 5 x2 2x1 3x6 3(x5)8x 5 3 一、解方程。 1 2xx36 6x4x5 4 6x18.5x6x12.5x

12、45696 9x x 15 8x5.5x9234 2 x81610x 7x5.5x3 7 x1x2 3x69x7 8 9 9 x8x 4x1.5x3x128 2 x9x4x10 6y10y2y7 6y4.5y9.5y165 8x2x5 4y64y6 7x(7x7)2x5(x4) 9 7 7 bbb88 6x4(x2)75(x9)4 2 8 5(x6)3x 4x2(3x4)45(x6) 44(x1)84(55x) 2(x2)7x 1 1 4(x3)3x7(x7) y26y2 2 2 x4 4x 24 7x7.5x10 6 5 x3 4x3 4x4 2(x4)8x 4 4 一、解方程。 7 8xx

13、17 x4x3 4 x3.5x6x2.5x101048 9x x 20 x3.5x32.554 4 5x81511x 8x8.5x9 5 x8x5 x87x9 2 3 9 x9x x5.5x5x172 8 9x4x6x3 9y5.5y9y14 y8.5y6y64 2x6x9 5y36y4 3x(3x9)8x5(x2) 9 9 9 bbb41 4x3(x3)22(x7)2 2 8 2(x7)4x 4x4(3x7)45(x6) 74(x2)68(17.5x) 5(x1)3x 1 1 5(x4)5x8(x9) y94y5 5 5 x3 4x 51 7x6.5x12 5 4 x1 4x2 2x5 2(x4)8x 6 3 一、解方程。 5 xx26 x3x6 2 x14.5x7x1.5x15275 5x x 3 x6.5x62.554 8 x81716x 6x5.5x4 7 x9x5 x99x6 8 3 5 x6x 3x5x7x178 8 x8x9x7 y10y5.5y14 y2y3.5y82.5 x7x3 8y96y8 3x(4x7)4x5(x3) 9 1 3 bbb82 3x5(x1)13(x9)8 8 4