1、(3)bb2b ( )(4)x7是方程8x1046的解。4.2x6.1 x4.84.5 x49.3x0.38.7 5.1x27.54 9.1x6.529.96.3x14175 7.1x21192 x0.75.523x21x308 28(x6)336 4x9.8(1)a2=2a ( )(2)含有未知数的等式就是方程。(3)tt2t ( )(4)x4是方程8x428的解。0.4x6.8 x0.35.7 x0.29.7x3.88.6 0.4x2.84 4.5x2.133.97.8x67245 4.1x3588 x0.76.23x82x255 40(x5)560 2.8x5.6(1)n2=2n ( )
2、(2)含有x的算式就是方程。(3)nn2n ( )(4)x7是方程4x523的解。2.2x5.8 x7.36.5 x4.28.8x1.88.4 7.2x49.68 5.3x5.941.85.9x87149 6.8x83393 x0.88.841x62x721 15(x3)180 0.2x9.5(1)t2(2)含有y的等式就是方程。(3)yy2y ( )(4)x5是方程9x837的解。3.1x8.1 x2.28.9 x3.17.7x1.19.7 5.5x35.2 4.6x7.220.49.9x68823 6x25395 x0.36.215x14x58 10(x4)120 1.6x9(1)b2=2
3、b ( )(3)4a44(a1) ( )(4)x9是方程7x954的解。3.3x7 x8.18.6 x4.59.3x1.89 9.1x62.79 8.5x8.117.44.5x14211 8.6x52550 x1.56.177x22x396 21(x3)168 4.8x7.1(4)x4是方程8x131的解。0.7x6.1 x3.28 x1.87.94.96.1 3.2x2.24 4.2x6.4238.7x56553 7.5x77523 x2.47.839x11x100 51(x6)459 4.2x9.1(1)d22d ( )(3)xx2x ( )(4)x6是方程5x822的解。2x5.4 x2
4、.46.7 x1.48.7x0.56 5.8x53.36 5.4x714.69.7x95584 5.1x77178 x4.38.397x35x528 11(x6)143 1.8x9.1(1)s22b ( )(3)yy2y ( )(4)x7是方程4x1018的解。3.6x5.7 x1.81.1 x4.46.52.37.9 2.4x14.88 4.7x8.115.46.7x33302 4.3x24148 x17.36x17x92 54(x3)648 3.7x7.5(1)y22a ( )(2)含有x的式子就是方程。(3)mm2m ( )(4)x6是方程8x345的解。1.9x8.5 x60.6 x3
5、.89.1x3.29.5 1.2x8.76 4.4x624.84.5x89181 4.7x32391 x0.8715x17x288 95(x9)1710 2.4x9.8(1)d2=2d ( )(3)cc2c ( )(4)x4是方程8x428的解。4.6x8.7 x5.95.6 x4.17.3x1.46.5 5.7x22.8 4.8x6.531.97.6x43337 6.6x99363 x4.67.872x90x1458 40(x1)360 0.6x8(2)含有未知数y的等式就是方程。(3)5b55(b1) ( )(4)x7是方程3x318的解。0.6x6 x56.6 x2.88.6x26.4
6、5.1x39.27 5.5x1.331.75.9x88384 8.5x30225 x16.438x89x889 93(x3)930 4.4x5.1(1)x2=2x ( )(3)bb2b ( )(4)x6是方程3x108的解。5x8.9 x35.9 x4.75.4x2.88.7 5.5x22 5.2x9.521.78.9x98169 8.4x27645 x4.15.884x24x540 87(x7)1044 0.4x8.4(3)3t33(t1) ( )(4)x8是方程7x452的解。0.1x7.2 x5.89.6 x45.9x0.16.2 7.9x2.37 8.4x2.864.45.8x1439
7、2 6.6x88176 x3.16.250x65x920 40(x8)520 5x9.8(1)a2(4)x8是方程6x840的解。2.5x8.1 x78.9 x1.57.3x1.75.5 6x16.2 6.7x6.846.87.5x43407 5.3x8871 x1.9734x25x236 88(x6)1320 2.9x6.7(3)2s22(s1) ( )(4)x7是方程7x346的解。3.6x5.2 x0.73.8 x1.27.2x0.39.7 8.3x29.88 9x1.352.78.2x75171 4.6x64304 x3.99.480x12x644 84(x4)756 3.1x7.7(4)x5是方程3x78的解。2.3x9 x0.31.9 x3.38.3x0.86.1 3.1x25.42 5x1299.3x41703 5.3x19458 x4.35.760x23x581 45(x9)585 1x5.6(4)x8是方程6x543的解。4.5x5.6 x31.4 x2.48.4x3.89.7 6.1x54.29 9.6x4.134.38x90230 9.3x45513 x1.67.520x67x174 40(x1)240 3.9x9.1
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