1、(4)x4是方程9x630的解。4.1x9.6 x2.90.4 x29.7x38.6 8.3x10.79 7.8x5.517.96.3x30474 8x13227 x0.59.821x64x510 67(x2)536 3.2x7.5(1)m22m ( )(2)含有未知数y的算式就是方程。(3)5t55(t1) ( )(4)x5是方程3x510的解。4.3x5.4 x2.38 x2.47.846.5 4.6x22.54 6.2x6.730.55.1x16290 8.9x66379 x3.25.646x45x728 56(x1)112 4.2x6.7(1)a22a ( )(2)含有未知数的等式就是
2、方程。(3)xx2x ( )(4)x8是方程4x329的解。0.4x7.4 x2.38.5 x1.16.2x1.68.4 2.8x21.28 8.9x9.5354.2x63231 9.6x33351 x2.96.160x29x623 20(x9)340 2.7x9(1)x22x ( )(2)含有未知数x的算式就是方程。(3)4b44(b1) ( )(4)x5是方程3x312的解。1.7x6.4 x7.61.3 x2.95.33.95.9 1x4.1 7.4x6.245.68.4x91245 8.9x43758 x0.48.570x36x318 28(x1)112 3.6x6.5(3)tt2t
3、( )(4)x9是方程9x873的解。1.4x7.7 x0.51.5 x4.79.7x3.86.3 4.7x14.1 8.9x0.526.24.4x30102 7.1x80417 x4.98.456x48x208 85(x1)510 4.5x5.5(1)b2=2b ( )(3)9t99(t1) ( )(4)x4是方程7x721的解。3x9.3 x9.36.1 x48.9x3.47.8 3.8x1.52 7.5x9.220.89.3x98367 6.3x93285 x0.46.429x58x174 84(x6)588 3.4x6.9(2)含有未知数y的式子就是方程。(3)cc2c ( )(4)x
4、6是方程8x939的解。0.3x9.5 x4.55.4 x1.19.63.68 3.8x25.08 5.7x5.240.47.5x98352 4.2x17361 x2.48.755x6x549 57(x1)570 0.5x7.2(1)t2(2)含有未知数的算式就是方程。(4)x8是方程7x749的解。3.3x8.3 x9.20.7 x1.36.53.95.3 3.6x34.56 6.2x5.925.16.8x75197 7.2x51309 x2.7751x21x72 59(x2)295 3.8x5.3(1)x2=2x ( )(4)x4是方程4x97的解。4.7x8.2 x0.87.8 x1.7
5、5.4x28 7.6x8.36 7.1x3.824.66.7x74529 4.5x5778 x4.19.750x10x60 48(x7)480 4.3x9(1)d22n ( )(3)xx2x ( )(4)x6是方程6x333的解。3.9x5.9 x1.12.3 x2.89.5x1.99.7 4.7x26.79 5x6.218.85.5x57328 5.5x55165 x3.78.595x28x984 75(x3)375 1.6x8.6(4)x6是方程4x1014的解。2.5x9.7 x3.65.6 x4.99.4x2.49.6 9.6x38.4 5.3x5.242.55.2x7977 6.8x
6、53559 x4.98.558x11x207 76(x5)684 4.7x9.9(1)s22s ( )(2)含有x的等式就是方程。(4)x9是方程3x126的解。5x6.3 x1.10.6 x4.49.23.45.2 9x55.8 8.7x7.635.99.6x73215 6.7x72531 x4.68.145x75x240 46(x7)414 1.9x7.6(2)含有y的等式就是方程。(3)5m55(m1) ( )(4)x7是方程8x452的解。4.6x7.9 x5.30.1 x0.75.81.17.7 1.1x2.31 5.9x3.843.48x24456 4.2x94116 x0.47.
7、353x72x750 96(x1)960 4.3x7.6(3)yy2y ( )(4)x4是方程6x420的解。1x7.6 x5.76.8 x3.46.3x4.27.5 6.1x54.29 6.9x6.328.25.8x40424 7.8x12222 x1.95.375x54x129 30(x3)240 2x9.4(1)c22y ( )(3)6x66(x1) ( )(4)x6是方程5x1020的解。1.4x6.4 x4.90.5 x2.97.8x3.69.6 5.3x27.03 6.9x5.150.14.8x77211 9.6x83301 x4.97.783x68x755 37(x8)555 4x6.4
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