1、(2)含有未知数x的等式就是方程。(3)cc2c ( )(4)x9是方程9x378的解。0.1x7.5 x1.33.7 x3.49.8x1.46.7 4.8x31.68 8.1x1.8637.2x64584 6.4x57263 x4.48.622x44x594 64(x6)640 1.2x8.3(1)s22s ( )(2)含有未知数x的式子就是方程。(3)aa2a ( )(4)x4是方程6x222的解。1.1x6.5 x0.78.9 x0.78.6x4.58.1 6.8x14.28 9.8x5.253.68.6x50724 7.2x62514 x4.15.839x93x924 77(x3)30
2、8 1.3x8.8(1)a22a ( )(2)含有未知数y的式子就是方程。(3)tt2t ( )(4)x4是方程3x210的解。0.9x6 x4.41.9 x1.77.3x3.77.6 0.7x4.97 5.1x4.321.27.7x38655 8.4x74430 x0.77.973x78x302 46(x1)322 3.6x9.2(1)c22d ( )(3)mm2m ( )(4)x9是方程8x963的解。0.2x5.6 x97.2 x4.66.63.25.4 9.6x16.32 4.5x7.433.19.7x96389 5.7x28257 x3.97.546x56x918 52(x7)468
3、 3.7x8.6(1)d2(2)含有未知数的式子就是方程。(3)xx2x ( )(4)x8是方程8x361的解。0.8x8.5 x4.56.9 x2.59.3x0.59.1 0.4x0.2 8.5x2.357.29.6x21459 4.3x68190 x4.77.662x70x528 58(x4)580 0.8x8.9(1)b22b ( )(3)ss2s ( )(4)x5是方程8x634的解。0.6x5.4 x87 x4.36.6x2.67.7 6x57 8.5x6.153.47.6x23661 6x80400 x4.66.695x59x1232 45(x3)270 4x8.5(2)含有y的等
4、式就是方程。(3)mm2m ( )(4)x8是方程3x321的解。0.1x7.9 x7.22.8 x4.86.736.7 7.4x68.08 6.3x6.125.46.4x59517 6.5x35420 x3.15.15x71x76 26(x3)104 2.6x8.3(1)m22x ( )(4)x7是方程4x424的解。4.1x7.4 x77.7 x3.46.9x3.17.6 1.4x3.08 6.3x2.341.86.1x60489 7.5x31269 x1.45.234x94x896 71(x5)923 3.7x9.2(1)a2=2a ( )(4)x7是方程9x756的解。0.4x8.3
5、x18.6 x0.68.7x2.96.8 2.1x19.74 9.1x0.971.95.4x49221 5.1x22284 x4.78.890x8x196 85(x4)765 1.2x7.9(2)含有未知数y的算式就是方程。(4)x4是方程4x511的解。0.4x9.7 x82.6 x1.65.8x3.37.5 2.5x14 8.8x3.649.25.2x81179 6.1x16533 x4.45.567x34x909 30(x1)270 1x6(3)3s33(s1) ( )(4)x5是方程4x416的解。4.4x9.8 x1.22.4 x3.18.7x0.66.8 6.6x36.96 4.7
6、x4.2245.4x9567 4.4x35185 x1.89.654x31x510 95(x7)950 3.4x5.5(1)a2(3)bb2b ( )(4)x7是方程4x622的解。2.7x9.5 x1.73.6 x4.38.9x3.99 6.9x0.69 8.6x3.973.57x98532 7.3x84354 x1.18.984x65x447 67(x6)871 1.4x8.9(2)含有y的算式就是方程。(3)4a44(a1) ( )0.2x8 x81.1 x2.75.1x4.47.5 2x6.2 5.1x7.77.67.4x60384 8.3x72675 x4.67.35x33x38 45(x2)180 4.5x5.3(2)含有y的式子就是方程。(3)7m77(m1) ( )(4)x9是方程5x936的解。2.7x5.9 x4.11.4 x3.16.3x1.98.7 7.4x60.68 6.8x4.529.57.6x44336 5.3x15303 x4.38.69x91x900 28(x2)140 4.9x5.5(4)x4是方程8x428的解。1.5x9.8 x4.77.9 x2.45.9x2.15.3 6.6x44.22 5.4x4.522.55.6x61387 9.6x87393 x4.25.886x57x286 99(x7)891 3.1x8.4
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