1、(2)含有y的等式就是方程。(3)dd2d ( )(4)x9是方程3x423的解。4.2x5.1 x0.81.5 x2.76.1x45.2 7.8x38.22 5.5x1.742.38.7x49647 5.4x89343 x1.39.824x79x721 74(x2)592 0.4x8.4(2)含有未知数y的式子就是方程。(3)bb2b ( )(4)x8是方程4x923的解。4.5x5.1 x1.16.5 x3.17.4x3.39.1 1.7x10.71 6.4x7.737.15.2x56256 5.4x53379 x1.89.538x77x920 64(x3)768 3.8x9.4(1)d2
2、2m ( )(3)yy2y ( )(4)x9是方程7x162的解。2.1x8.6 x2.61.7 x1.56.7x4.48.4 7.9x8.69 8.5x1.124.49.9x55440 8x86234 x3.18.214x97x111 61(x4)427 3.7x5.6(1)s22s ( )(2)含有x的等式就是方程。(3)ss2s ( )(4)x4是方程5x416的解。1.4x8.5 x5.13.1 x1.56.7x3.99.2 1.9x13.68 5.9x9.48.36.2x82166 9.8x57727 x47.465x55x840 52(x1)260 1.3x9.8(1)d2=2d
3、( )(2)含有未知数的式子就是方程。(3)2d22(d1) ( )(4)x9是方程3x819的解。1.1x5.2 x5.52 x0.56.3x45.4 7.1x12.07 5.5x4.811.76.5x15310 8.6x91253 x0.28.484x82x664 70(x5)630 1.8x9.5(1)c22c ( )(2)含有未知数y的算式就是方程。(3)tt2t ( )(4)x8是方程7x947的解。3.4x8.1 x9.53.4 x4.35.8x17.3 5.1x19.89 9.5x6516x71169 8.9x93708 x4.69.233x66x594 42(x2)420 4.
4、2x5.3(1)x22x ( )(3)nn2n ( )(4)x6是方程9x846的解。4.9x8.3 x5.24 x2.85.2x2.59 5.7x26.22 8.5x6.644.46.2x56192 8.5x33307 x28.463x76x834 88(x2)792 1.6x6.2(1)c2(2)含有x的式子就是方程。(3)9x99(x1) ( )(4)x9是方程4x333的解。2.5x5.9 x5.54.6 x0.75.9x1.75.3 7.1x1.42 7x7.420.67.7x24592 5.4x38448 x0.65.648x37x255 63(x6)945 2.2x5.3(1)y
5、2(4)x7是方程4x721的解。5x8.3 x3.81.1 x0.57.4x2.99.3 1.2x9.12 8.7x2.223.99.3x36708 5.8x66166 x4.99.647x93x280 35(x8)490 0.9x6.6(1)a22b ( )(3)4n44(n1) ( )(4)x8是方程9x369的解。4.1x5.3 x43.3 x2.35.6x3.46.4 4.4x29.04 5.8x4.747.57.5x85365 9.6x57711 x2.77.932x22x486 34(x3)238 4.9x8.7(1)a2=2a ( )(3)mm2m ( )(4)x5是方程7x2
6、33的解。1.5x9.3 x3.78.2 x0.37.2x3.39.1 3.5x32.55 7.3x1.849.35.1x51306 6.6x70326 x1.95.520x46x462 30(x9)540 4.1x7(1)y2=2y ( )(2)含有未知数的算式就是方程。(3)dd2d ( )(4)x5是方程4x911的解。4.4x5.8 x0.96.7 x1.68.3x1.48.2 5.6x0.56 9.2x819.65.1x15342 7.8x97137 x1.28.810x42x468 96(x9)1536 0.2x8.6(1)s2(2)含有未知数y的等式就是方程。(4)x4是方程8x725的解。3.5x6 x2.36.3 x3.19.5x2.46.3 2.6x1.82 8.4x3.946.57.4x72298 5x46104 x0.16.261x38x99 85(x6)765 1x6.9
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