1、七年级数学上册解方程专项练习 122x2y20.8x0.21.318x3(x1)9(x6)195x4(15x)5(100x)(400x)20017x249x192xx14(3x)5(x4)5(3x2)3x53/2(x6)(4x5)x4y40.4x0.96.623x6(x8)8(x7)144x3(20x)7(100x)(600x)40020x215x242xx135(6x)2(x4)5(4x4)4x5(x4)(5x7)x1y20.1x0.42.121x9(x7)9(x1)203x3(10x)2(200x)(600x)40016x257x198xx134(3x)2(x10)5(2x4)4x8(x1
2、0)(4x1)3/2x230.9x0.74.225x2(x4)7(x3)156x2(14x)5(200x)(600x)20013x273x293xx25(5x)3(x6)2(2x1)4x7(x2)(5x7)x350.7x0.11.514x7(x7)2(x9)166x3(18x)3(200x)(500x)30014x356x304xx124(5x)4(x1)2(2x3)2x93/2(x2)(8x2)x1y50.8x0.76.325x2(x6)9(x3)174x3(12x)5(300x)(500x)30017x293x212xx14(4x)4(x8)5(2x2)4x53/2(x6)(4x9)3/2
3、220.7x0.83.229x6(x6)8(x5)143x5(10x)3(100x)(600x)20018x276x226xx44(4x)2(x10)4(2x5)3x8(x4)(9x6)3/2130.7x0.26.421x4(x6)3(x4)192x4(18x)2(300x)(400x)40018x382x196xx135(6x)4(x4)4(4x4)3x5(x8)(8x1)x120.5x0.23.721x2(x9)4(x1)155x5(18x)8(100x)(400x)40020x333x277xx123(3x)2(x8)4(2x2)2x6(x4)(2x1)450.4x0.54.213x5(x5)5(x4)126x5(19x)9(300x)(500x)400