人教版七年级数学上册第三章一元一次方程复习题精选100.docx

1、人教版七年级数学上册第三章一元一次方程复习题精选100一、解方程。 5 8xx26 x9x8 2 x0.5x8x7.5x30654 5x x 13 x0.5x8324 4 3x6311x 7x2.5x14 9 x2x9 3x76x6 2 1 5 x7x 8x6.5x9x192 8 6x3x9x20 y8y10y15 8.5y7.5y3y57.5 3x5x7 y54y3 5x(3x7)9x2(x6) 5 1 9 bbb29 9x3(x5)73(x7)8 4 2 5(x2)5x 2x2(6x1)33(x8) 83(x6)36(43.5x) 5(x3)3x 1 1 5(x1)6x2(x7) y84y

2、9 3 5 x3 1x 16 8x1.5x6 3 2 x2 4x3 3x1 4(x8)8x 5 2 9a(28a)5 5b(5b3)12 3x4(5x4)9 6y2(1y8)7 2(x6)5(x2) 6x3(x9) 3x3 3x9 7x8.5x17 2 5 5x7 6x4 2x6(x6) 6 9 6y9 7y7 3 5(51.5y)(4y7) 4 8 2y9 3y1 8y5 4 3(x2)5(x6) 2 8 10 9x2 2x5 x3.5x5 3 8 4x7 5x9 4x8(x7) 3 12 一、解方程。 1 xx57 5x9x8 2 8x5.5x8x10.5x401036 3x x 15 x

3、7.5x30.548 2 x61711x 4x5.5x3 7 x5x9 4x28x7 8 1 1 x7x x10x6x202 2 x2x9x11 1.5y9.5y4y18 5.5y7y3y57 8x2x5 5y78y2 7x(9x5)3x2(x7) 5 5 9 bbb29 4x4(x4)75(x7)8 2 4 2(x5)9x 5x2(6x3)92(x4) 82(x4)34(38.5x) 4(x9)7x 1 1 7(x2)6x6(x6) 4y23y9 5 5 x1 3x 45 x2.5x3 4 3 x3 2x2 9x2 4(x3)4x 2 2 5a(66a)2 2b(2b7)12 9x4(5x6

4、)9 4y3(1y9)4 2(x5)8(x5) 3x5(x1) 8x6 7x5 x9.5x14 3 8 5x7 7x2 2x8(x7) 6 12 3y8 2y3 4 2(42.5y)(1.5y9) 4 6 9y3 6y2 5y3 1 2(x3)8(x6) 4 6 12 4x3 5x8 x4.5x3 3 7 8x8 9x2 9x9(x6) 6 9 一、解方程。 7 3xx56 4x3x3 4 3x16.5x2x19.5x45225 9x x 7 x1.5x8512 8 9x52016x 7x2.5x2 7 x7x3 x38x3 2 5 1 x2x 8x3.5x4x158 2 x7x9x16 8y

5、4y10y11 6y2y4.5y194.5 3x5x7 6y52y5 2x(4x1)8x2(x3) 7 5 3 bbb22 3x3(x9)62(x6)8 4 8 2(x7)8x 6x4(5x9)92(x7) 64(x4)72(46x) 4(x5)6x 1 1 2(x4)4x9(x4) y68y6 6 5 x3 2x 41 9x6.5x20 6 4 x1 3x1 8x6 4(x3)9x 5 5 7a(19a)2 9b(6b5)12 6x3(2x3)15 8y4(4y5)10 4(x6)5(x6) 3x3(x4) 8x2 3x6 3x6.5x14 4 7 2x2 6x7 8x4(x9) 6 12

6、4y4 6y9 5 2(14y)(2y6) 2 6 6y2 4y7 8y3 5 2(x2)6(x2) 4 8 12 9x9 6x4 2x3.5x17 3 6 3x8 4x2 3x6(x9) 6 12 一、解方程。 7 xx59 4x6x3 8 x14.5x4x16.5x30614 7x x 6 9x7.5x72.572 8 9x5710x x3.5x8 1 x7x9 5x38x1 4 5 7 x7x x4x5x182 2 6x6x4x10 8.5y4.5y3.5y8 4.5y4.5y6y163.5 x4x3 5y83y2 6x(6x1)9x2(x9) 1 9 5 bbb23 2x2(x5)62

7、(x9)4 2 4 2(x8)2x 6x3(3x3)65(x4) 23(x4)78(32x) 5(x8)9x 1 1 5(x1)2x2(x6) y59y8 5 3 x2 3x 55 2x1.5x10 2 4 x3 2x1 9x1 5(x5)8x 2 3 9a(27a)-2 5b(3b5)13 9x3(6x3)18 6y3(5y5)7 2(x4)5(x4) 2x3(x8) 9x9 3x3 9x2.5x18 2 8 9x8 6x3 3x8(x3) 3 9 4y2 3y3 6 4(53.5y)(2.5y8) 4 8 4y8 7y9 3y3 5 4(x6)8(x2) 2 6 12 9x5 9x9 9x

8、2.5x16 2 7 6x8 2x2 8x7(x6) 6 12 一、解方程。 7 xx19 2x9x8 4 8x1.5x8x13.5x15859 9x x 8 4x7.5x34.528 8 x31520x 4x4.5x12 5 x8x3 5x56x7 8 5 5 x6x 6x4x5x178 8 x4x4x5 9y6.5y5.5y16 5y2y4.5y129 x8x2 7y29y6 8x(7x2)5x3(x9) 9 9 5 bbb24 5x5(x3)65(x8)8 4 4 5(x1)3x 4x2(3x1)95(x4) 24(x7)82(97.5x) 3(x8)8x 1 1 3(x2)3x2(x3

9、) 9y86y5 4 6 x1 1x 31 7x7.5x10 3 6 x1 3x1 9x3 5(x5)2x 6 3 4a(48a)-5 6b(2b7)15 5x2(4x3)20 8y2(6y7)3 4(x6)7(x1) 3x2(x7) 4x5 3x2 7x5.5x4 3 5 8x9 9x8 8x4(x5) 3 12 9y6 2y7 4 2(54.5y)(4.5y4) 4 8 2y2 3y5 7y6 1 4(x5)7(x2) 2 6 10 6x8 3x7 4x6.5x14 2 6 5x9 2x6 5x8(x9) 6 12 一、解方程。 7 2xx37 3x4x5 8 9x8.5x5x8.5x40

10、1043 3x x 17 x2.5x8418 2 9x21316x x1.5x11 7 x5x7 x68x4 2 1 9 x3x x3.5x9x154 2 5x5x8x11 7y5.5y8.5y20 y7y4y173 2x2x2 3y84y6 4x(5x9)6x5(x6) 7 7 3 bbb47 8x2(x8)73(x2)8 4 4 4(x8)3x 3x4(6x6)22(x6) 73(x6)44(37x) 3(x4)7x 1 1 2(x4)3x4(x8) y54y9 4 5 x2 4x 55 6x4.5x12 6 5 x2 3x3 7x5 2(x7)9x 4 2 6a(63a)3 9b(4b7

11、)11 2x4(6x9)6 9y2(2y8)5 3(x5)7(x1) 2x5(x6) 8x4 9x8 x1.5x4 3 6 9x4 3x5 9x5(x2) 3 9 4y5 2y4 3 5(22y)(2y3) 4 8 8y7 8y9 6y8 2 3(x1)6(x5) 2 8 10 8x1 5x8 x7.5x3 3 7 4x4 5x9 6x3(x2) 6 12 一、解方程。 3 xx58 5x5x7 2 x0.5x6x3.5x35288 5x x 20 x9.5x3198 4 x91817x 3x6.5x14 3 x9x9 x66x7 2 7 7 x9x x2x9x124 8 15x2x9x11

12、4y6.5y2.5y18 y6.5y7.5y166 x3x4 y84y2 5x(2x4)3x4(x3) 9 3 1 bbb44 3x4(x7)54(x3)2 2 4 2(x5)9x 2x3(6x9)45(x6) 64(x5)26(68.5x) 4(x6)8x 1 1 4(x1)5x2(x2) 9y75y8 2 4 x2 4x 21 5x6.5x9 2 4 x3 3x2 4x1 4(x3)9x 2 4 9a(63a)3 8b(2b6)27 2x4(4x6)14 3y4(1y2)2 4(x4)7(x1) 8x6(x3) 7x8 5x3 7x2.5x16 2 7 5x3 2x5 8x4(x7) 6

13、9 8y8 5y5 3 4(11.5y)(2y8) 2 8 8y8 9y8 8y9 3 2(x2)5(x4) 4 8 10 7x5 5x9 7x5.5x19 4 7 3x6 4x5 9x2(x7) 3 9 一、解方程。 7 xx16 x9x9 2 x9.5x5x17.5x40279 7x x 14 x2.5x71.584 2 x6620x x6.5x3 7 x2x4 x28x8 8 1 5 x2x x1x3x122 4 x4x9x5 7.5y8.5y7y6 y2.5y9y136 9x5x3 8y59y4 4x(4x2)2x2(x5) 5 5 1 bbb22 3x2(x8)32(x7)8 8 2 4(x3)3x 3x3(6x4)84(x5) 33(x10)58(83.5x) 2(x5)3x 1 1 8(x3)6x5(x8) y54y5 5 2 x4 3x 44 4x7.5x14 2 4 x4 3x3 3x5 4(x9)8x 3 4 7a(19a)3 5b(5b4)29 5x4(4x8)7 8y4(5y8)10 4(x4)5(x1) 2x3(x8) 4x2 4x1 x