1、5.9x73104 5x66134 x1.97.610x63x657 49(x6)637 1.3x9.7(1)t22t ( )(2)含有y的式子就是方程。(3)7d77(d1) ( )(4)x7是方程4x820的解。2.1x6.3 x4.72.7 x2.26.7x3.35.8 7x49 6.5x9.99.65.9x32145 7.1x73282 x3.57.723x20x86 79(x1)790 2.2x5.5(1)c22n ( )(2)含有未知数的式子就是方程。(4)x6是方程4x321的解。1.7x9.6 x0.90.7 x4.68.3x1.95.6 0.4x3.68 6.8x1.353.
2、19.6x83205 8.8x66550 x0.16.910x9x95 65(x7)910 3.5x9(1)a2=2a ( )(3)4d44(d1) ( )(4)x4是方程7x721的解。4.5x6.9 x1.50.2 x3.87.2x0.56.8 2.5x16 8.7x7.318.88.2x86406 5.2x58202 x0.28.852x90x142 39(x5)546 4.7x9.6(1)t22a ( )(2)含有未知数x的等式就是方程。(3)6m66(m1) ( )(4)x4是方程6x321的解。2.6x7.4 x1.96.7 x3.77.8x3.89.6 2.3x12.42 6x6
3、184.3x31356 8.1x76167 x4.9966x22x176 18(x9)180 0.3x9.8(1)a2(3)mm2m ( )(4)x8是方程4x626的解。2x8.2 x76.6 x1.69.3x0.66 9.2x82.8 6.4x1.936.58.5x75605 5.8x87319 x1.85.133x68x101 48(x8)528 1.3x5.2(1)n22b ( )(2)含有未知数y的算式就是方程。(3)yy2y ( )(4)x6是方程9x648的解。4.7x7.7 x1.63.2 x3.67.4x4.39.9 5.6x3.92 8.4x3.272.46.6x98298
4、 7.8x79389 x48.631x68x495 86(x9)860 0.6x5.5(3)aa2a ( )(4)x9是方程6x549的解。4.1x7.1 x9.27.3 x1.86.729.8 4.5x4.5 8.1x5.526.99.1x23614 7.9x53579 x4.7987x9x384 29(x9)493 1.4x9.3(1)d22d ( )(4)x9是方程7x855的解。1x8.5 x6.21.4 x0.45.5x1.58.5 1.8x5.22 7.5x2.527.57.1x23403 7.6x73155 x2.97.936x3x351 82(x8)1066 3.5x6.4(1)c2=2c ( )(2)含有未知数的等式就是方程。(3)tt2t ( )(4)x7是方程3x120的解。1x9.5 x2.62.7 x29.8x1.86.9 3.7x16.65 5.4x1.614.6