1、(2)含有x的算式就是方程。(3)yy2y ( )(4)x9是方程6x252的解。2x6.3 x1.32.7 x1.55.4x0.15.1 1x2.4 7.9x6.157.16.3x57321 5.4x67419 x3.35.631x13x220 69(x8)1173 0.4x9.1(1)s22s ( )(2)含有未知数y的算式就是方程。(3)4b44(b1) ( )(4)x5是方程8x733的解。3.7x5.7 x8.44.7 x2.65.3x0.28.2 0.4x2.28 7.4x5.923.74.4x53255 8.7x58725 x1.66.127x26x371 66(x4)594 3
2、.2x9.9(1)s22x ( )(2)含有未知数的等式就是方程。(3)dd2d ( )(4)x8是方程5x1030的解。1.3x8.2 x4.19.4 x4.85.63.46.4 2.6x14.56 9.9x2.447.18.6x63625 4.7x49186 x2.16.470x7x231 58(x9)812 0.9x7.4(1)a22a ( )(3)xx2x ( )(4)x7是方程9x1053的解。1.4x7.7 x6.82.7 x2.18.528.5 6x37.8 6.1x4.731.96.8x62414 5.2x45423 x3.85.686x73x477 85(x1)680 0.9
3、x7.3(1)d22y ( )(2)含有未知数的式子就是方程。(4)x7是方程8x650的解。2.1x6.1 x9.43.7 x0.49.2x2.69.1 3x16.5 4.1x5.327.54x48272 5.2x66194 x3.58.223x19x126 75(x9)750 3.6x7.4(1)a2(2)含有未知数x的算式就是方程。(3)ss2s ( )(4)x6是方程3x513的解。2.4x9.8 x3.69.4 x3.96.2x3.17.9 0.4x3.2 7.9x0.239.38.3x20229 6.6x96432 x1.75.942x41x166 96(x8)1440 3.9x8
4、.6(3)cc2c ( )(4)x8是方程8x163的解。1.5x5.7 x6.62.5 x3.79.40.15.9 7.2x44.64 5.1x0.330.39.3x59406 7.7x97519 x4.27.683x96x1432 90(x1)810 2.2x8.4(1)x22c ( )(2)含有y的算式就是方程。(3)mm2m ( )(4)x6是方程9x846的解。3.7x9.9 x1.60.2 x36.6x3.36.9 2.2x1.1 9.6x0.176.77.7x72544 8.7x79530 x2.15.36x63x276 76(x8)1140 1.5x6.4(1)n2=2n (
5、)(4)x9是方程7x657的解。3x6.9 x5.45.8 x1.75.72.26.5 3.6x14.04 6.2x5.125.94.8x85251 7.2x22626 x35.349x68x351 47(x8)564 4x9(3)2c22(c1) ( )(4)x9是方程6x945的解。2.5x5.6 x3.62.7 x0.48.7x3.95.4 4.2x4.62 6.2x3.621.25.5x29411 8.1x43281 x3.99.718x40x116 31(x1)217 1.7x8.1(2)含有x的式子就是方程。(4)x6是方程6x333的解。1.4x8.3 x80.8 x3.38.1x1.98.5 7.9x32.39 4x4.17.98.6x80608 4.2x2799 x1.68.231x69x300 45(x4)360 0.5x8.8(3)tt2t ( )(4)x7是方程3x813的解。0.4x5.8 x6.27.7 x2.271.26.8 2.5x12.5 8.7x5.173.25.7x77322 9.8x53437 x2.78.541x78x714 97(x1)582 3.6x9.1
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