1、七年级数学上册一元一次方程16一、解方程。 5 2xx49 x6x5 2 x13.5x2x5.5x20812 9x x 19 2x9.5x90.574 4 4x31220x 3x5.5x17 7 x7x5 x27x8 2 3 9 x6x x8x9x202 2 x9x8x15 y4.5y7y6 y6.5y4.5y65.5 x7x6 y43y4 3x(2x7)2x2(x9) 5 3 3 bbb85 5x3(x7)25(x9)8 8 8 5(x9)3x 3x3(6x4)85(x7) 82(x7)56(62.5x) 5(x4)9x 1 1 4(x3)4x1(x2) y45y6 2 4 x1 1x 42
2、 x3.5x20 5 4 x4 3x1 3x2 5(x7)7x 6 4 5a(52a)-1 7b(6b9)26 2x3(2x5)19 2y3(2y7)6 2(x1)7(x3) 6x5(x8) 2x7 3x2 x0.5x20 2 5 5x7 5x3 3x7(x8) 6 12 4y6 4y2 2 2(84.5y)(1.5y3) 4 8 3y1 4y1 9y1 3 2(x3)8(x1) 2 8 12 8x6 4x1 x6.5x10 4 5 5x3 7x6 4x7(x6) 6 9 一、解方程。 5 6xx47 x4x3 8 8x5.5x5x14.5x151064 5x x 11 x1.5x3588 8
3、 x91416x x2.5x6 7 x5x5 x36x6 8 5 5 x9x x3.5x6x154 2 4x3x7x14 8.5y7.5y10y9 y9y7y203 2x6x5 y79y6 6x(8x1)9x2(x7) 9 9 3 bbb87 8x4(x2)63(x4)8 2 8 3(x4)2x 4x3(4x3)15(x8) 33(x7)88(64.5x) 2(x9)5x 1 1 5(x4)6x8(x8) 9y74y2 2 6 x2 3x 14 6x7.5x17 6 4 x1 4x2 2x3 4(x3)8x 2 5 3a(16a)-2 2b(5b9)3 4x4(2x6)5 9y3(4y3)10
4、 3(x5)7(x4) 6x5(x4) 8x8 4x9 x9.5x9 2 6 9x3 2x7 6x7(x9) 6 12 8y5 3y3 4 2(91.5y)(4.5y3) 4 8 8y1 4y8 2y9 5 4(x2)6(x6) 2 8 12 3x7 4x6 9x3.5x3 2 7 2x3 5x1 7x3(x3) 3 12 一、解方程。 3 xx39 5x8x6 2 8x11.5x2x9.5x25611 7x x 13 x4.5x9422 4 x31819x 5x5.5x11 7 x2x9 x39x2 4 3 7 x5x x4x2x194 2 x4x7x2 8y2.5y5.5y14 5.5y6
5、.5y3.5y177.5 x3x9 y55y8 7x(9x6)3x5(x8) 7 1 7 bbb47 2x5(x2)62(x1)4 4 2 2(x2)5x 4x2(6x7)15(x1) 42(x3)54(88.5x) 2(x2)8x 1 1 4(x5)5x7(x1) 2y74y6 5 4 x1 3x 53 x8.5x14 2 4 x2 4x1 2x6 2(x8)4x 6 3 5a(63a)-4 6b(4b9)19 2x3(2x8)2 3y3(6y4)5 3(x1)7(x1) 5x3(x3) 6x3 4x7 5x9.5x6 4 8 3x1 3x2 2x7(x7) 6 12 9y3 2y8 2 2
6、(81.5y)(4y7) 4 8 7y5 8y9 4y6 4 3(x5)8(x6) 2 8 12 9x8 8x3 4x4.5x3 4 6 7x8 9x3 4x3(x3) 3 12 一、解方程。 5 3xx18 7x7x5 8 9x15.5x3x16.5x201055 9x x 18 x9.5x6234 2 5x7915x x2.5x16 3 x7x1 x28x1 2 5 5 x8x x4.5x5x154 2 15x8x6x19 7.5y5.5y6.5y3 4y8y3.5y123.5 x3x4 y89y4 9x(9x1)3x2(x7) 3 1 3 bbb46 5x5(x8)84(x2)2 4 4
7、 4(x8)5x 5x3(2x1)75(x7) 92(x5)64(97.5x) 4(x6)2x 1 1 7(x6)3x8(x9) y75y4 4 2 x4 1x 54 3x7.5x14 4 3 x3 3x2 2x6 3(x8)6x 5 6 5a(68a)-1 5b(3b7)18 2x4(2x2)17 3y4(6y8)2 2(x5)6(x2) 4x3(x2) 6x6 5x1 x1.5x7 4 8 2x3 7x3 2x6(x4) 6 9 7y4 8y6 3 5(32.5y)(2.5y7) 4 6 3y3 8y5 7y6 1 3(x4)5(x6) 4 6 10 2x9 4x9 x9.5x5 4 6 6x8 6x5 7x7(x4) 3 9
