1、44x69x791 40(x2)320 2.3x9.8(1)y22y ( )(2)含有未知数y的等式就是方程。(3)9y99(y1) ( )(4)x7是方程8x254的解。1.8x9.6 x8.54.6 x1.37.9x0.75.8 6.8x34.68 9.9x5.643.95.9x28444 4.6x26250 x0.77.885x98x1647 64(x3)768 0.5x7.1(1)s2=2s ( )(2)含有x的算式就是方程。(3)yy2y ( )(4)x5是方程5x322的解。4.8x8.9 x5.42.9 x2.25.4x3.18.9 4.8x23.04 8.8x3.358.38.
2、4x29391 9.4x22448 x4.29.398x68x830 17(x6)204 3.1x6.4(1)c2(2)含有未知数y的式子就是方程。(3)xx2x ( )(4)x7是方程4x523的解。4.7x9 x9.25.2 x3.894.18.3 3.6x11.88 7.6x464.44.7x21308 6.4x65383 x2.88.551x6x114 67(x7)536 3.6x7.5(1)a22a ( )(2)含有未知数的算式就是方程。(3)4m44(m1) ( )(4)x4是方程7x721的解。4.3x7 x7.10.2 x2.55.2x0.27.5 8.5x51.85 4.1x
3、7.629.38.8x82534 6.1x93212 x4.85.368x52x960 66(x3)594 4.4x6.9(1)s22s ( )(2)含有未知数的式子就是方程。(3)mm2m ( )(4)x5是方程5x421的解。2.4x5.1 x7.40.6 x0.36.34.15.2 6.7x63.65 9.6x731.44.8x85251 4.4x43221 x0.36.598x52x450 22(x4)132 2.9x7.7(3)9c99(c1) ( )(4)x4是方程8x725的解。0.4x7.1 x1.46.2 x1.28.9x4.29.7 8.9x2.67 9.6x8.539.5
4、6.3x65124 6.1x28216 x0.78.856x18x592 76(x7)608 3x9.6(1)m22m ( )(3)dd2d ( )(4)x7是方程7x247的解。4.7x7.8 x7.50.6 x3.79.71.96.1 6.5x61.75 8.7x7.3715.4x43443 4.4x95213 x3.85.339x92x262 28(x1)56 0.2x7.6(2)含有x的等式就是方程。(3)4a44(a1) ( )(4)x8是方程7x0.5x5.9 x9.81 x4.17.52.25.5 9.1x89.18 7.8x4.442.46.6x89241 5x60140 x1
5、.26.256x91x294 49(x8)490 2.2x5.6(1)y2(4)x6是方程9x1044的解。4.7x7.2 x6.81.6 x3.45.9x0.79.9 5.5x4.4 6.2x4.620.26.3x55134 7.6x73155 x0.36.111x80x91 14(x6)126 0.4x9.4(2)含有y的算式就是方程。(3)4d44(d1) ( )(4)x5是方程3x411的解。4.6x7.3 x7.89 x2.29.30.55.5 5x25.5 8.8x2.441.66.6x38226 5.1x16137 x4.65.888x67x310 33(x6)231 4.2x8
6、.2(2)含有未知数x的算式就是方程。(3)mm2m ( )(4)x9是方程9x477的解。2.6x8.5 x5.34.5 x3.36.43.29.5 5.8x40.6 5.7x0.245.45.4x38394 5.3x93172 x0.18.82x94x96 43(x6)602 1.5x5.2(1)a2=2a ( )(2)含有未知数y的算式就是方程。(3)nn2n ( )(4)x9是方程9x873的解。1.2x8.4 x7.39.4 x0.28.8x3.57.1 9x63 9.7x1.576.19.5x29826 8.7x87522 x1.25.45x46x204 89(x7)1157 2.
7、6x9.9(1)x2=2x ( )(3)8a88(a1) ( )(4)x8是方程4x131的解。3.3x8.3 x8.42.5 x2.29.21.35.3 9.7x40.74 8.8x6.919.55.2x71241 8.4x34470 x0.95.780x61x846 77(x8)1001 4.4x5.2(1)c2=2c ( )(3)8n88(n1) ( )(4)x5是方程7x728的解。2x9.5 x3.32.5 x1.19.41.29 7.2x31.68 5.1x8.27.17.7x79537 5.8x93139 x2.69.949x30x711 68(x6)748 3.2x6.1(1)
8、d2(3)3t33(t1) ( )(4)x6是方程6x927的解。1.8x9.9 x5.95.2 x3.48.8x3.69.6 9.1x53.69 9.9x5.663.76.1x50377 9.9x80316 x0.59.719x91x990 36(x9)648 3.5x6.4(1)b2(2)含有y的式子就是方程。(3)xx2x ( )(4)x8是方程6x147的解。4.1x6.2 x5.34.6 x37.6x4.87.2 1.1x2.53 8.3x7.658.89.3x90561 4.5x7362 x4.78.582x93x525 58(x1)348 2.2x7.1(1)s2(2)含有未知数
9、x的式子就是方程。(3)2a22(a1) ( )(4)x5是方程9x342的解。2.3x5.4 x1.64.4 x2.85.9x2.67.7 7.8x2.34 6x5.136.98.1x97389 6.5x39286 x0.78.152x57x981 98(x5)784 0.7x7.4(4)x9是方程6x1044的解。3.2x5.4 x3.76 x1.89.7x1.57.5 8.6x60.2 8.9x8.553.84.4x6369 9.7x25751 x3.99.494x35x1032 80(x2)720 3.9x9.3(1)x22x ( )(3)4x44(x1) ( )(4)x9是方程4x9
10、27的解。4.3x5.1 x3.18.4 x4.19.2x1.65.5 7.6x5.32 7x8419.1x99538 7.6x32196 x1.65.120x96x232 48(x1)480 4.3x9.6(3)aa2a ( )(4)x6是方程8x543的解。0.4x9.8 x3.99.5 x2.39.43.86.4 9.4x29.14 5.8x1.233.66.4x9795 9.9x73719 x0.89.912x50x62 57(x1)285 0.8x7.1(4)x4是方程5x1010的解。1.1x6.7 x1.99.9 x1.69.4x2.69.8 3.5x9.1 6.8x6.8344
11、x61179 7.5x89211 x0.15.569x48x936 28(x1)280 0.6x6.8(1)n22n ( )(4)x5是方程9x639的解。2x8 x7.99.2 x45.7x3.87.7 3.5x24.85 6.6x4.641.65x6288 8.7x95166 x4.29.77x51x58 63(x7)819 0.3x7.6(1)t2=2t ( )(4)x6是方程9x945的解。4.3x7.1 x51.8 x4.55.1x3.76.2 1.5x13.8 8x9.730.38.6x34310 5.9x80156 x0.16.619x26x90 44(x6)616 1.4x7(
12、3)ss2s ( )(4)x8是方程7x254的解。2.9x7 x7.73.4 x3.47.2x1.58.9 5x36 5.6x3.713.14.2x82128 9.7x10863 x3.19.213x86x396 26(x5)260 3.7x8.9(1)m2=2m ( )(4)x9是方程9x477的解。0.7x5.3 x6.27.6 x0.86.3x2.48 7.5x42.75 9.2x1.771.95.2x27233 4.3x21237 x0.75.939x62x808 47(x4)423 2.4x6.1(3)5n55(n1) ( )(4)x5是方程4x515的解。0.1x8.8 x3.48 x26.1x4.87 1.6x2.08 7.7x0.753.25.7x96303 4.9x73368 x4.38.714x58x216 55(x5)660 4.2x9.6(3)dd2d ( )(4)x6是方程3x612的解。3.6x9.3 x3.97.6 x2.25.7x3.46.1 7.1x9.94 6.4x7.936.95.1x46158 6.9x75546 x2.59.124x78x204 58(x7)580 4.4x6.4
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