1、(1)y22y ( )(2)含有未知数的等式就是方程。(3)dd2d ( )(4)x8是方程5x832的解。1x9.7 x2.72.2 x2.58.8x4.37.4 7.4x5.92 4.7x3.215.64.2x93243 8.6x25749 x3.46.384x46x910 63(x7)630 0.4x7(1)d2=2d ( )(3)tt2t ( )(4)x8是方程4x230的解。4x8.5 x12.1 x4.26.7x2.28.7 0.8x0.96 6.3x8.735.47.1x31253 5x23277 x4.26.985x10x190 88(x2)264 1.5x9.9(1)t22s
2、 ( )(2)含有x的算式就是方程。(3)bb2b ( )(4)x5是方程3x312的解。3.8x8.8 x2.42.1 x4.76.1x0.98.2 0.3x2.67 9.5x3.981.66.9x10266 7.9x62333 x1.17.488x67x1085 13(x1)91 2.5x6(1)a22a ( )(2)含有未知数y的式子就是方程。(3)xx2x ( )(4)x4是方程8x725的解。3.6x6.2 x71.2 x3.88.3x3.37.7 4.9x11.76 4.9x6.332.95.9x26269 4.7x16125 x2.95.523x75x686 43(x6)344
3、1.2x6.1(3)aa2a ( )3.9x5.6 x0.65.6 x1.25.42.48.8 1.9x3.23 6.9x1.760.46.8x37575 5.3x72405 x1.19.763x55x708 69(x5)483 4.6x6.2(1)y2=2y ( )(3)nn2n ( )(4)x5是方程8x238的解。4.6x7.8 x72.5 x3.55.93.88.3 5.7x41.61 7.2x743.44.3x5376 9.4x66780 x2.58.861x29x270 43(x7)344 2.2x6(1)n22n ( )(4)x4是方程5x416的解。2.8x7.5 x4.17.
4、1 x0.98x2.25.2 3.6x25.56 7x7.434.67x26324 8.2x73419 x1.65.735x59x94 20(x6)160 2.3x6.5(1)x22x ( )(3)aa2a ( )(4)x6是方程3x108的解。4.8x5.5 x6.24.7 x1.16.1x2.98.1 4.4x30.8 6.6x8.637.64x37203 7.2x81351 x1.86.828x54x492 43(x8)602 1.8x7.4(1)d2(2)含有未知数的式子就是方程。(3)ss2s ( )450的解。3.9x7.8 x6.51.3 x2.25.5x3.35.3 5.4x4
5、4.82 7.3x9.534.39.9x92205 9.8x83211 x2.16.951x77x1152 48(x2)384 4.7x9.9(1)b2=2b ( )(3)4m44(m1) ( )(4)x4是方程4x97的解。4.1x9.5 x8.36.4 x25.3x4.58.3 7.1x19.17 7.9x9.729.87.5x52398 6.7x94174 x2.17.622x57x632 11(x5)77 1.3x9(1)m22m ( )(3)8x88(x1) ( )(4)x4是方程6x222的解。2.8x9.8 x0.71.5 x0.75.12.19.9 9.5x38.95 6.6x
6、8.950.57x88192 7.3x61158 x2.45.944x82x378 25(x7)200 2.3x6.1(1)s2=2s ( )(2)含有未知数y的等式就是方程。(3)2d22(d1) ( )(4)x5是方程6x624的解。3.4x6.9 x9.38 x1.65.33.38.6 2.9x21.17 5.6x6.4449.2x49503 7x72208 x4.25.170x47x936 51(x2)561 0.5x7(1)a2(4)x8是方程7x353的解。1.7x5.1 x9.29.5 x2.88x4.49.8 9.3x57.66 7.7x0.645.66.7x33235 9.8
7、x54240 x0.2854x86x1260 83(x8)1079 3.4x5.5(3)6x66(x1) ( )(4)x4是方程6x519的解。4.9x5.5 x9.67.2 x3.88.9x3.29.6 9.3x30.69 8.1x2.222.17.6x81147 6.2x49323 x4.35.940x11x102 99(x4)594 0.9x9.8(1)s2(3)cc2c ( )(4)x7是方程9x855的解。3.7x9.3 x87.1 x3.97.5x1.77.6 1.7x5.44 9.3x0.2375.9x75161 4.1x8975 x4.15.63x34x111 49(x6)686 1.1x7.9
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