1、1.6x7.5 x41.5 x4.59.7x0.56.1 7.1x48.99 8.4x4.271.46.1x18226 9.7x90201 x2.89.189x22x222 23(x1)92 1.7x9(1)s22s ( )(3)cc2c ( )(4)x9是方程7x558的解。3x5.8 x8.70.4 x2.56x0.25.5 8.9x67.64 6.1x7.934.86.8x16392 5.9x76337 x0.6769x85x1232 36(x6)396 1.2x8.8(1)y2=2y ( )(3)nn2n ( )(4)x6是方程6x432的解。0.5x7 x8.18 x35.6x3.6
2、9.2 5x28 9.7x5.481.98.7x35313 8.9x57388 x28.235x11x46 56(x3)280 0.6x6.9(2)含有未知数的等式就是方程。(4)x9是方程9x279的解。4.5x8.8 x0.56.4 x3.17.1x0.69.8 8.2x67.24 5.7x6.827.49.8x90694 9.4x85761 x1.67.834x86x600 86(x6)1204 3.8x9.5(1)t22m ( )(2)含有未知数x的等式就是方程。(4)x5是方程9x1035的解。4.7x8.3 x6.67.7 x3.46.32.37.5 4.4x13.64 4.6x0
3、.6278.7x21414 9.7x98775 x0.57.88x89x776 77(x2)462 2.5x9.5(1)c22c ( )(2)含有x的算式就是方程。(3)yy2y ( )(4)x8是方程8x361的解。3.9x7.7 x7.75.4 x3.28.72.69.1 6.9x49.68 9.5x2.654.48x96144 6.4x93291 x2.17.492x51x572 16(x7)224 3.5x5.1(4)x7是方程5x530的解。4.3x9.6 x7.35.2 x1.65.6x4.99.1 5.3x27.56 9.1x9.772.24.1x9866 6.9x31521 x
4、1.86.948x78x756 59(x3)649 1.6x5.8(2)含有未知数的算式就是方程。(3)tt2t ( )(4)x7是方程6x735的解。4.8x9.1 x8.84.7 x1.29.4x29.8 4.6x4.14 4.1x6.214.36.2x99149 8.8x87705 x19.266x18x588 15(x9)180 1.8x8.2(4)x9是方程7x855的解。2.8x5.7 x0.69.6 x2.65.5x4.99.8 4.1x9.84 9.1x1.634.89.7x76215 6.7x10191 x4.98.383x47x780 43(x7)602 2.6x8.1(1
5、)a2=2a ( )(3)aa2a ( )(4)x6是方程8x642的解。2.8x7.5 x9.93.8 x3.38.1x2.96.3 2x8.6 9.4x0.727.59.3x47697 4.9x5988 x4.65.134x76x660 25(x8)350 3.1x7.4(1)d22d ( )(2)含有未知数x的算式就是方程。(3)bb2b ( )(4)x6是方程4x1014的解。3.9x7.5 x2.45.8 x2.27.3x2.29.6 1.9x10.83 4.1x4.915.68.2x70258 7.9x57575 x0.47.697x19x928 72(x1)576 1.6x7.9
6、(3)4d44(d1) ( )(4)x7是方程9x162的解。0.9x9.8 x82.6 x1.36.63.26.4 5.4x9.18 6.9x7.2489x44586 6.2x23349 x3987x21x324 90(x9)1350 4.2x5.8(1)x2=2x ( )(3)dd2d ( )(4)x8是方程7x353的解。2.5x8.1 x9.32 x0.85.2x4.65.9 8.4x73.92 7.9x4.235.38.3x33382 9x94176 x37.286x35x847 52(x7)728 0.8x5.1(1)a2(3)6y66(y1) ( )(4)x5是方程5x718的解。0.9x9.1 x1.32.2 x0.27.9x3.19.9 6.4x12.16 9.9x0.4596.5x89171 6.7x24244 x46.565x34x495 89(x7)890 1.4x7.6(4)x8是方程4x824的解。1.2x8.1 x4.21.9 x1.49.7x0.17.1 5.9x31.86 9.3x6.7779.5x98567 5.2x28284 x1.55.427x28x165 18(x3)216 0.1x7.8
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