1、(1)a22b ( )(2)含有x的算式就是方程。(3)yy2y ( )(4)x8是方程9x666的解。3.5x9.2 x4.26.4 x0.37.5x2.86.9 8.9x67.64 4x7.820.28.8x96608 4.7x4695 x25.189x97x1302 96(x6)672 4.6x8(1)s22s ( )(2)含有未知数的式子就是方程。(3)mm2m ( )(4)x8是方程7x749的解。2.1x8.2 x8.17.7 x1.88.5x4.65.2 3x26.1 6.9x9.952.26.5x23367 4.5x3996 x4.75.151x46x873 29(x4)232
2、 2.2x7.2(3)3d33(d1) ( )(4)x6是方程5x624的解。2.9x7.9 x37.1 x25.9x2.97.1 5.1x19.89 4.8x8.629.89.5x97568 9.9x92601 x1.75.863x94x1099 78(x1)390 0.1x5.8(1)x22x ( )(2)含有未知数的等式就是方程。(3)cc2c ( )(4)x8是方程9x270的解。1.3x5.2 x7.14.5 x2.37.7x0.65.9 6.8x4.08 6.3x718.27x39311 9.5x98757 x1.68.365x49x114 27(x3)189 5x6.1(1)t2
3、2m ( )(4)x5是方程8x931的解。2x6.9 x6.26.2 x3.75.50.65.8 4.8x44.64 6.2x2.915.79.9x55638 7.3x34331 x0.87.639x60x297 41(x5)451 2.1x5.7(1)s22d ( )(3)xx2x ( )(4)x5是方程6x2.1x8.2 x6.94.3 x2.49.7x4.18.4 3.7x11.47 4.7x0.718.18.7x96426 9.1x78741 x4.25.52x16x54 61(x2)305 1.8x6.2(1)a2=2a ( )(2)含有y的式子就是方程。(3)2n22(n1) (
4、 )(4)x7是方程8x848的解。3.6x9.2 x8.14.5 x3.98.946.3 1.6x10.56 8.1x460.89.3x48696 9.4x58788 x4.76.574x44x590 16(x7)208 4.1x7.2(1)n2=2n ( )(2)含有未知数y的式子就是方程。(3)3t33(t1) ( )(4)x4是方程4x313的解。0.8x7.6 x0.47.7 x2.39.22.49.5 9.3x62.31 4.1x4.389.4x97749 8.8x28500 x3.17.379x44x615 81(x9)1377 0.4x5.9(1)y22y ( )(2)含有未知
5、数y的等式就是方程。(3)yy2y ( )(4)x9是方程5x738的解。3x5.6 x2.78.6 x0.48.3x3.75.2 5.8x53.36 5.9x4.248.94.7x7368 9.3x20631 x3.66.622x99x121 48(x8)624 0.9x8(1)c22c ( )(2)含有x的等式就是方程。(3)4n44(n1) ( )(4)x4是方程5x614的解。4.9x6.9 x5.71.6 x3.65.11.69.5 7.7x15.4 8.4x3.655.25.1x42162 9.9x40851 x2.67.581x98x537 49(x9)637 2.3x5.4(1
6、)a2(4)x6是方程8x741的解。4.1x5.1 x3.25.9 x0.17.50.28.4 2.2x21.34 4.4x3.2105.9x46485 7.8x84384 x4.55.720x86x954 99(x9)1782 3.4x6.5(1)m2=2m ( )(4)x6是方程7x339的解。1.8x5.8 x4.85.6 x0.16.6x3.27.2 4.2x7.56 6.6x3.655.84.3x46341 8.1x91233 x1.96.783x30x339 38(x8)342 3.3x9.8(2)含有未知数x的等式就是方程。(3)5c55(c1) ( )(4)x6是方程4x32
7、1的解。4.6x9.6 x2.68.2 x4.76.3x45.8 1x0.5 6x1.852.29.5x87198 4.3x83304 x2.29.729x85x570 89(x2)267 1.3x8.4(1)b2(3)tt2t ( )(4)x4是方程8x626的解。1.1x9 x8.78 x4.58.8x4.47.3 0.4x2.04 8.2x5.352.19.7x23268 8.8x71281 x4.67.677x38x920 81(x4)405 2.3x6.8(3)7d77(d1) ( )(4)x5是方程9x1035的解。3x7 x62.3 x4.45.53.49.7 5.5x24.2
8、6.1x8.59.89.9x95202 5.6x40296 x3.87.786x5x273 43(x6)602 1.2x9.8(1)d2(3)cc2c ( )(4)x4是方程7x424的解。4.6x9.8 x0.66.3 x3.37.71.27.6 3x20.1 7x0.427.65.4x30294 9.1x77651 x2.46.649x7x448 48(x3)240 1.5x8.4(4)x5是方程4x911的解。1.7x6.3 x9.11.6 x0.98.40.38.6 9.9x54.45 7.6x7.4616.5x79376 8.9x16518 x4.37.314x2x48 39(x4)
9、234 1.9x6.9(4)x5是方程4x218的解。1.2x5.8 x76.7 x2.28.4x4.57.5 6.6x38.94 5x2.132.98.6x85689 9.4x64500 x4.25.688x49x1233 94(x7)1316 2.6x5.1(3)6m66(m1) ( )(4)x8是方程7x848的解。0.3x8.9 x2.71.8 x4.35.4x4.29 9.1x49.14 6.2x2.528.57.4x27195 5.7x97188 x4.66.181x23x832 43(x9)430 1.3x6.7(1)s2=2s ( )(4)x7是方程4x424的解。0.5x7.
10、5 x9.77.9 x1.56.3x1.86.7 4.4x24.2 8.7x1.3778.6x71703 9.8x64230 x2.8814x14x112 75(x6)825 4.1x6.5(1)d2=2d ( )(4)x7是方程3x219的解。2.9x8.2 x5.67.1 x2.56x3.15.6 5.1x10.2 8.4x7.517.75.8x84438 7.7x13218 x3.38.388x86x348 10(x5)140 1x5.1(3)5d55(d1) ( )(4)x4是方程6x717的解。2.1x5.8 x9.67.3 x15.7x0.25.2 3.5x23.1 4.8x0.323.77.4x27343 8.5x68527 x2.28.280x10x180 27(x7)351 2.4x5.1(4)x6是方程3x414的解。1.3x9.4 x1.76.7 x4.36.2x1.99.2 0.4x3.92 5.8x8.226.65.4x53109 6.2x49323 x39.512x83x760 32(x2)288 4.5x7.4(3)8m88(m1) ( )(4)
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