1、(2)含有未知数的式子就是方程。(3)aa2a ( )(4)x6是方程6x135的解。3.5x5.8 x7.76.2 x2.36.2x48.9 0.8x6.4 6.1x4.519.94.4x38314 4x28132 x1.49.994x15x654 69(x7)828 1.6x9.6(1)a2=2a ( )(2)含有未知数的算式就是方程。(3)aa2a ( )(4)x6是方程7x636的解。3.4x9.2 x4.76.2 x4.38.4x4.66.2 8.9x65.86 5.2x4.710.95.3x25293 7.7x92601 x1.19.38x76x420 75(x7)1050 3.3
2、x7.7(1)t22t ( )(2)含有未知数y的算式就是方程。(3)3m33(m1) ( )(4)x9是方程3x225的解。1.5x5.5 x43.6 x3.57.4x45.8 1.7x2.38 7.9x7.132.49.4x46330 9.5x84486 x2.59.564x38x510 96(x1)672 2.1x8(1)t2=2t ( )(2)含有y的式子就是方程。(4)x4是方程4x88的解。0.6x8.8 x9.92.6 x3.35.5x3.38.2 7.5x73.5 6.7x9.637.39.7x66710 9.5x22453 x2.5729x81x660 81(x3)810 4
3、.9x9(1)b22b ( )(3)2y22(y1) ( )(4)x4是方程6x123的解。1.6x7 x9.56.9 x2.88.84.86.4 4.6x0.92 7.9x6.640.86.5x81179 5x39361 x1.35.777x25x102 41(x9)574 3.7x5.2(1)c2(3)3a33(a1) ( )(4)x4是方程9x234的解。2x7.1 x8.69.4 x4.45.1x3.95.7 6.7x20.77 8x0.155.99.6x24360 8.2x37455 x0.98.923x54x385 38(x9)380 0.9x6.7(1)n22n ( )(2)含有
4、未知数y的式子就是方程。(4)x4是方程9x630的解。1.1x6.3 x2.72 x49.82.95.4 1.7x9.35 7.4x8.757.99.2x48228 8.9x63471 x4.28.286x43x645 83(x9)913 0.6x5.4(2)含有x的式子就是方程。(3)mm2m ( )(4)x5是方程9x342的解。4.5x5.3 x8.16 x2.17.5x4.27 9.8x9.8 9.1x2.225.14.1x51318 7.8x28518 x1.16.585x94x1432 93(x9)930 2.6x9.3(3)9x99(x1) ( )(4)x8是方程5x238的解
5、。3.7x5.3 x2.17.1 x2.46.50.58 9.3x20.46 6x3.614.46.1x87279 9.9x33264 x3.7917x96x339 48(x5)624 3.7x6.3(1)c2=2c ( )(2)含有未知数x的式子就是方程。(3)2n22(n1) ( )(4)x9是方程7x954的解。1.5x9.1 x1.25.8 x3.67.3x1.49.8 3.5x32.2 9.4x7.729.97.3x98413 5.3x51426 x4.35.910x53x63 55(x4)385 3.9x9.5(1)m2=2m ( )(2)含有y的等式就是方程。(3)7n77(n1
6、) ( )(4)x6是方程9x648的解。1.9x5.6 x7.25.9 x0.67.4x0.99.4 6.3x7.56 7.9x1.338.28.1x61425 5.5x24141 x0.97.837x16x106 72(x8)720 0.7x6.1(1)m22y ( )(2)含有未知数x的等式就是方程。(3)nn2n ( )(4)x9是方程6x648的解。1.9x5.2 x3.97.6 x1.28.84.49.6 9.3x2.79 7.6x9.428.65.9x83153 8.4x12240 x4.69.623x95x590 57(x5)456 3x8.3(2)含有未知数y的等式就是方程。
7、(3)ss2s ( )(4)x5是方程3x411的解。0.6x7.8 x4.62.7 x3.48.20.16 7.7x6.93 4.6x3.124.57.3x32260 7.7x81612 x1.9745x51x192 41(x6)451 5x9.9(1)n2(3)3b33(b1) ( )(4)x7是方程7x643的解。2.7x5.3 x8.78.5 x1.15.6x3.39.7 5.5x14.85 9.7x5.282.16.1x71234 5.2x44424 x2.29.882x50x132 96(x5)960 0.5x8(1)d2=2d ( )(4)x9是方程7x954的解。4.7x5.6
8、 x7.42.8 x2.68.63.49.7 1.9x3.04 6.5x8.817.26.7x33302 9.5x11464 x1.78.325x30x385 32(x4)352 1.2x6.5(3)yy2y ( )(4)x7是方程7x841的解。3.9x7.7 x0.36.2 x2.58.50.66.5 2.7x18.9 4.8x2.4364.7x49139 9.8x69421 x3.56.22x9x99 47(x9)846 1.6x8.6(1)s22s ( )(2)含有x的算式就是方程。(3)dd2d ( )(4)x7是方程6x735的解。3.6x7.2 x4.44.3 x1.18.80.89.7 6.1x12.2 8.2x9.723.15.1x72387 8x79481 x3.2795x44x556 58(x3)638 2.2x8.6(3)5y55(y1) ( )(4)x8是方程3x717的解。4.8x8.1 x4.25.1 x1.19.91.15.5 7.9x58.46 7.2x1.548.94.8x26310 5.1x72234 x3.3831x25x56 73(x5)730 2.2x6.9
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