1、x4.45.3 4.9x17.64 8.3x7.267.54.7x43286 5.6x9474 x0.15.582x50x1188 18(x5)198 4.5x5.3(1)c2=2c ( )(2)含有未知数x的算式就是方程。(3)tt2t ( )(4)x5是方程7x728的解。0.5x5.6 x3.43.4 x3.76x1.57.7 3.7x0.37 7.2x5.723.15.7x68388 7.1x43312 x0.59.87x50x114 80(x6)640 2.2x5.9(1)d22d ( )(2)含有未知数的算式就是方程。(3)tt2t ( )(4)x5是方程8x238的解。1.5x8
2、.8 x6.59 x0.85.6x0.17.4 1.4x11.9 5.1x218.45x45155 4.7x59364 x1.38.252x99x1208 67(x9)1206 3.4x6(1)y22y ( )(4)x4是方程4x88的解。3x6.9 x4.99.9 x4.37.9x0.79.1 2.9x13.63 7.9x0.470.74.2x49245 5.9x65230 x0.88.993x27x840 33(x5)297 2.3x8.3(1)x22x ( )(3)aa2a ( )(4)x9是方程3x1017的解。1.4x7.5 x9.57.7 x4.78.81.85.8 3.1x26.
3、97 6.1x3.227.39.7x38253 8.6x80178 x2.67.12x29x186 82(x8)1230 0.8x5.2(1)n2=2n ( )(2)含有未知数的式子就是方程。(4)x4是方程7x1018的解。0.1x8.5 x7.21.5 x0.38.71.27.2 9.1x70.98 8.5x4.920.65.1x20388 6x69291 x1.25.914x87x202 83(x8)1245 0.1x7.5(1)c22c ( )(3)6c66(c1) ( )1.7x6.6 x7.96 x1.69.1x2.18.8 3.5x0.35 4.7x320.58.1x34452
4、4.2x47289 x2.86.114x93x107 11(x7)99 0.5x6.1(4)x4是方程8x626的解。2.7x8.7 x9.48.5 x3.95.6x4.16 9.4x13.16 7.8x3.235.86x33447 5.5x40290 x1.59.486x57x572 70(x5)630 0.5x6.8(1)b2=2b ( )(3)dd2d ( )(4)x6是方程7x141的解。4.4x8.6 x3.96.4 x4.67.9x0.57.6 0.9x7.92 7.9x8.262.95x72128 6.1x99145 x4.85.999x99x1386 36(x2)252 4.5
5、x7.6(1)t2=2t ( )(2)含有未知数y的算式就是方程。(3)mm2m ( )(4)x4是方程5x812的解。4.8x7.6 x4.16.5 x2.86.2x3.99.2 6.2x1.24 9.5x3.472.65.6x57279 4x77203 x3.75.764x5x621 36(x5)396 1.3x8.5(1)t22b ( )(4)x8是方程4x1022的解。0.1x6.5 x7.35.5 x0.69.9x1.75.8 8.4x70.56 5.9x9.132.27.8x29517 7.7x25360 x3.67.635x50x170 42(x6)630 4.6x5.1(1)a
6、2=2a ( )(2)含有x的算式就是方程。(4)x7是方程9x1053的解。2.8x9.1 x37.8 x4.47.8x1.78 3.8x35.72 9.3x7.947.97x69281 4.5x61209 x0.47.578x36x342 73(x9)1022 1.9x7.5(1)m22m ( )(4)x9是方程5x243的解。1.3x9.2 x1.15.1 x29.3x4.49.8 0.8x6.64 4x1.822.26.3x66375 7.1x45523 x4.26.17x56x189 93(x5)744 0.7x5.2(1)b2(3)5c55(c1) ( )(4)x4是方程4x214的解。0.5x6.5 x9.75.2 x1.69.6x1.26.2 4x23.2 7.3x9.356.46.3x41463 7x87403 x2.26.233x71x208 75(x4)675 1.8x9.4(4)x6是方程7x834的解。4.9x5.3 x3.68.7 x3.77.6x3.96.8 9.7x
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