七年级数学上册一元一次方程152.docx

1、七年级数学上册一元一次方程152一、解方程。 7 xx57 x9x8 2 7x6.5x7x6.5x25621 3x x 9 9x7.5x9254 4 x6611x x8.5x3 1 x3x9 3x89x9 2 5 9 x3x x3x4x172 8 x5x8x17 8.5y7y5.5y11 y1.5y6y81.5 x9x8 y84y7 7x(2x10)4x4(x3) 7 1 9 bbb89 5x2(x7)75(x3)4 2 4 5(x9)6x 6x3(4x5)63(x6) 94(x5)98(41.5x) 3(x9)9x 1 1 2(x6)2x4(x2) 6y84y4 4 4 x1 4x 63 4

2、x5.5x7 4 6 x1 2x1 6x3 5(x5)8x 3 4 4a(68a)3 3b(2b5)18 5x3(3x8)6 5y2(5y9)6 4(x1)8(x1) 4x2(x9) 4x2 4x9 8x8.5x17 2 6 2x2 3x2 4x7(x4) 6 9 8y5 5y3 3 5(72.5y)(2y3) 4 6 8y4 2y8 8y8 5 3(x2)8(x6) 2 8 10 3x4 8x4 4x7.5x18 4 6 4x7 8x7 8x9(x6) 6 9 一、解方程。 3 2xx17 4x9x9 4 6x12.5x8x11.5x25261 3x x 5 x1.5x23.514 8 x3

3、515x 7x9.5x10 7 x9x3 5x37x6 8 5 3 x4x 4x2x5x162 8 16x8x7x11 y8y6y12 y4.5y2.5y210 x6x8 9y72y5 8x(9x1)8x2(x9) 1 5 7 bbb87 2x2(x4)45(x5)8 8 4 2(x8)6x 5x2(6x3)73(x6) 72(x6)48(54.5x) 2(x9)6x 1 1 6(x5)2x9(x2) 2y56y4 5 5 x2 1x 14 x6.5x6 3 5 x2 2x4 4x1 3(x7)4x 2 3 7a(27a)1 3b(4b2)18 5x2(4x9)5 7y3(1y5)6 3(x5

4、)5(x2) 9x4(x9) 4x9 4x2 2x7.5x17 2 7 8x6 8x5 2x2(x2) 3 12 9y2 3y7 4 3(82y)(1.5y5) 2 6 8y8 6y4 2y1 4 4(x3)8(x6) 4 6 10 5x1 4x1 x9.5x6 3 7 2x5 6x5 8x5(x7) 3 9 一、解方程。 9 8xx46 x3x8 4 x5.5x6x1.5x301071 9x x 16 x7.5x41.534 2 3x4811x 4x9.5x13 9 x7x3 5x59x4 4 5 1 x3x 4x5x9x122 2 x4x9x15 y4.5y5.5y13 10y3y4y16

5、9.5 x7x2 y75y7 3x(3x4)7x3(x9) 1 1 7 bbb84 4x5(x7)33(x8)8 4 4 2(x4)2x 2x3(2x3)95(x9) 72(x3)86(27x) 3(x7)2x 1 1 3(x5)3x8(x7) 9y58y5 2 2 x3 3x 22 2x9.5x19 3 5 x3 4x3 7x4 5(x9)6x 2 2 4a(47a)0 7b(4b4)20 6x3(6x6)19 8y3(3y8)2 4(x2)7(x2) 8x4(x9) 3x9 2x6 6x7.5x2 2 8 2x8 7x7 7x5(x7) 3 9 2y9 7y3 3 6(83.5y)(4.5

6、y5) 2 8 7y1 6y9 3y9 1 2(x1)6(x6) 4 6 10 3x9 4x1 4x4.5x12 3 7 9x7 9x4 3x7(x8) 3 12 一、解方程。 7 2xx48 8x4x6 8 5x5.5x3x16.5x15296 7x x 18 x4.5x7214 4 x21620x 4x1.5x12 5 x3x1 x67x3 4 1 1 x8x 7x6.5x4x178 8 4x8x4x3 y3.5y5.5y3 y8y7y179 x7x4 9y79y8 2x(8x9)2x5(x7) 9 1 1 bbb29 8x2(x7)23(x7)2 8 8 5(x8)3x 2x2(2x7)

7、62(x7) 93(x5)32(67.5x) 2(x2)2x 1 1 5(x5)4x1(x7) y85y7 2 3 x3 3x 54 x4.5x10 5 6 x1 3x1 2x6 4(x7)7x 5 2 4a(14a)-3 7b(3b4)22 5x2(6x6)6 5y3(4y3)10 2(x3)5(x1) 3x6(x7) 8x6 8x5 8x7.5x16 2 8 6x4 9x4 5x4(x9) 3 12 3y1 5y4 6 4(103.5y)(2y2) 4 8 4y9 8y3 6y4 1 2(x4)6(x4) 2 8 12 7x9 3x7 x8.5x10 2 6 8x2 3x4 8x2(x7) 6 9