1、(1)d22d ( )(3)nn2n ( )(4)x9是方程3x720的解。3.3x8.6 x6.51.8 x0.97.2x0.65.9 5.1x40.8 8.7x0.343.24.5x28332 9x77283 x1.38.860x93x459 77(x6)770 1.3x7.4(1)b2=2b ( )(2)含有未知数的算式就是方程。(3)mm2m ( )(4)x8是方程6x444的解。2.7x7 x4.94 x3.48.9x1.25.9 9.3x14.88 5x9267x89261 7.2x60228 x4.47.83x81x420 30(x8)390 4x5.3(1)x22x ( )(2
2、)含有y的算式就是方程。(3)aa2a ( )(4)x6是方程4x420的解。3.5x9.9 x7.69.8 x0.35.7x1.86.2 6.4x16.64 9.2x1.8815.6x92244 5.1x23283 x4.56.456x46x612 33(x7)264 1.1x7.9(1)d2(2)含有y的式子就是方程。(3)bb2b ( )(4)x8是方程3x816的解。3.7x9.4 x5.85.5 x4.96.8x18.3 8x4 9.3x6.7777.4x46176 9.9x28269 x1.37.16x37x387 18(x5)144 0.8x5.8(3)cc2c ( )(4)x7
3、是方程6x537的解。1.3x5.7 x3.46.1 x17.7x3.37.5 1.3x7.67 9.2x2.634.27.6x16364 7.2x35613 x4.89.436x14x50 97(x1)194 2.9x8.1(1)a2=2a ( )(4)x5是方程4x515的解。4.4x7.2 x9.30.9 x26.2x2.27 9.5x76.95 5.8x6.716.57.2x95193 4.5x82188 x3.27.176x65x987 68(x8)748 0.6x5.1(1)y22m ( )(3)4n44(n1) ( )(4)x5是方程8x139的解。1x7.3 x9.43.9 x
4、1.96.117.5 8.4x74.76 5.8x518.27.9x68248 8.9x35766 x4.98.753x41x376 63(x6)441 3.2x9.1(1)n22n ( )(3)8x88(x1) ( )(4)x8是方程6x147的解。3.1x9 x6.59.2 x2.68.4x3.68.2 5.2x34.84 8.1x6.825.65.6x29307 4.1x93153 x4.67.184x77x1127 50(x3)500 3.1x6(2)含有未知数y的等式就是方程。(4)x4是方程8x626的解。4.8x8.1 x6.35.9 x0.56.34.59.7 8.2x35.2
5、6 9.6x8.839.25.6x43461 5.1x58248 x0.59.637x13x100 69(x9)966 1.5x7.6(1)s22s ( )(2)含有未知数x的等式就是方程。(3)4t44(t1) ( )(4)x5是方程6x327的解。2.1x9.8 x3.25.4 x3.88.54.45.4 5.2x50.96 8.7x1.876.56.9x70137 5.8x76214 x0.86.663x32x475 58(x4)522 3.9x5.5(2)含有未知数x的式子就是方程。(3)3t33(t1) ( )(4)x6是方程4x321的解。3.1x9.3 x96.9 x2.86.9
6、x2.49.3 5.5x29.7 4.3x7.722.47.1x18550 9.3x49230 x0.69.291x55x438 97(x3)1067 0.7x8(1)n2(2)含有y的等式就是方程。(4)x7是方程5x926的解。3.7x9.1 x2.85.1 x0.95.13.38.1 2.3x10.35 5.7x5.8178.2x10564 9.8x34260 x2.25.933x26x236 59(x2)472 2.8x9.9(1)t2=2t ( )(3)dd2d ( )(4)x6是方程6x432的解。0.1x7.8 x4.95 x3.78.8x49.3 5.4x19.44 8.5x2
7、.423.14.5x34101 5x33167 x0.55.958x28x516 10(x7)130 3.2x8.8(1)m2=2m ( )(2)含有未知数x的算式就是方程。(3)cc2c ( )(4)x7是方程4x226的解。0.3x8.6 x60.3 x1.78.7x26.9 1.3x9.49 5.5x2.624.97.7x60479 4.9x29265 x1.87.311x35x184 58(x1)464 4.6x5.3(3)yy2y ( )(4)x9是方程4x135的解。4.1x7 x9.31.3 x3.77x1.38 9x25.2 8.8x5.764.79x61209 8.6x681
8、90 x17.971x10x162 57(x2)513 1.9x6.5(1)x2=2x ( )(3)tt2t ( )(4)x8是方程5x436的解。4.6x7.8 x9.50.4 x1.45.8x3.85.2 8x30.4 9.1x5.521.86.6x87507 6.5x90430 x3.87.252x93x870 51(x7)765 2.3x9.5(1)m2(4)x7是方程8x353的解。0.9x5.7 x3.74.8 x4.88.4x2.99.4 9.9x49.5 8.7x9.425.44.1x56272 8.2x33295 x0.55.477x41x708 10(x1)70 3.1x6.2(1)n2=2n ( )530的解。2.7x6 x4.57.7 x1.85.92.59.1 1.8x8.46 7.5x5.716.88.7x53208 5.6x48232 x2.35.818x91x327 62(x1)124 2.4x6.2
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