1、2b ( )(2)含有未知数y的算式就是方程。(3)7a77(a1) ( )(4)x6是方程5x426的解。0.2x6.9 x7.59.1 x0.75.5x1.58 0.5x1.2 4.7x4.523.79.4x76676 8.9x91621 x1.35.85x46x459 66(x5)462 3x7.9(1)t2=2t ( )(2)含有未知数的等式就是方程。(3)yy2y ( )(4)x7是方程4x1018的解。0.9x8.8 x3.94.3 x1.46.4x1.86.4 3.2x31.36 8.3x0.532.76.1x79287 4.4x92304 x3.57.34x20x192 65(
2、x9)780 1.4x5.3(1)x2=2x ( )(3)ss2s ( )(4)x8是方程7x155的解。3.2x6.1 x4.20.6 x1.35.8x0.47.4 8.7x72.21 8x4526.6x41157 4.3x3594 x3.66.412x44x112 82(x7)1148 0.7x7.3(1)b2(3)ss2s ( )(4)x9是方程3x819的解。3.8x9.8 x0.26.6 x4.96.5x2.38 4.4x11.88 4x6.617.47x94326 4.9x16180 x1.76.611x15x78 97(x9)970 1.3x9.9(1)t2(2)含有x的算式就是
3、方程。(4)x9是方程9x1071的解。1.3x9.2 x9.92 x4.28.30.39.1 9x9.9 6.2x7.916.97.9x29603 8.4x18318 x1.87.690x91x1629 55(x7)660 1.1x8.3(1)m22m ( )(3)aa2a ( )(4)x6是方程5x921的解。1.1x5.8 x4.19.8 x3.38.5x4.25.6 5.4x3.78 7.2x1.926.99x29691 9.7x91782 x3.95.18x46x324 32(x5)256 1.5x7.3(3)cc2c ( )(4)x6是方程8x444的解。1.7x6.4 x4.42
4、.5 x1.56.5x4.38.8 0.1x0.79 5.2x2.518.34.2x7947 4.2x90120 x3.75.16x5x33 99(x4)990 4.3x5.5(1)c2=2c ( )(2)含有y的算式就是方程。(3)mm2m ( )(4)x6是方程3x315的解。0.7x5.9 x98.2 x3.65.3x47.1 4.9x4.41 7.1x8.912.45.9x80451 6.5x89106 x0.5643x83x882 67(x3)469 3x6.9(1)a2=2a ( )(3)6t66(t1) ( )(4)x6是方程4x519的解。2.4x6.4 x8.73.4 x4.
5、99.3x0.87.3 4.9x28.91 7.8x4.934.14.4x15161 7.4x37333 x3.99.220x85x315 37(x4)407 4.7x9.7(1)d22d ( )(4)x9是方程9x873的解。2.8x8.9 x8.12.1 x1.58.84.15.1 3.7x31.82 9.6x6.522.38.4x81339 4.2x74136 x3.67.911x74x595 61(x2)549 1x8.3(1)s2(2)含有未知数的式子就是方程。(4)x7是方程3x516的解。4.4x7.6 x5.45.4 x0.25.5x37.8 3.2x10.88 4.4x8.5
6、4.79.3x15729 8x61419 x4.65.489x24x339 71(x1)568 3.1x8(1)d2(2)含有未知数x的算式就是方程。(3)9y99(y1) ( )(4)x8是方程4x1022的解。3.9x5.2 x4.14.4 x0.67.6x19.7 9.5x17.1 6.8x1.139.78.6x21753 9.1x76379 x3.76.634x58x184 77(x8)1078 2.6x7.1(3)5y55(y1) ( )(4)x6是方程9x450的解。3.2x6.4 x9.70.1 x4.29.6x2.85.4 5.9x37.17 4.4x8.322.54.3x65
7、64 6.4x82494 x0.78.113x45x290 36(x6)396 3.7x8.8(1)n22n ( )(2)含有未知数y的式子就是方程。(3)9x99(x1) ( )(4)x8是方程6x939的解。1.6x7.9 x3.62 x1.76.6x1.39.1 9.8x41.16 4.6x5.78.16.5x93232 4.8x17127 x0.38.863x19x574 82(x2)902 4.5x8.4(1)m2=2m ( )(2)含有未知数y的等式就是方程。(3)6d66(d1) ( )(4)x7是方程4x127的解。1.5x6.1 x5.81.5 x0.77.81.38.3 8
8、.5x16.15 9.6x6.351.38.7x60549 4.4x90174 x2.98.165x39x416 37(x5)296 0.3x9.4(4)x6是方程6x729的解。2.7x7.7 x6.56.2 x48.13.56.1 8.1x16.2 5.9x4.918.75.4x6795 6.2x39333 x36.85x93x196 85(x3)680 3.8x6.3(3)5d55(d1) ( )(4)x7是方程3x219的解。2.8x5.4 x3.36.4 x0.55.3x0.46.5 6.2x61.38 5.3x6.4364.8x41391 5x7872 x4.78.493x35x1024 49(x5)343 5x9.5
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