1、6.5x31294 8.8x13515 x0.36.782x65x735 44(x9)660 0.4x9.1(1)b22b ( )(2)含有y的等式就是方程。(3)cc2c ( )(4)x6是方程3x711的解。1.7x9 x1.23.2 x0.47.2x2.68.4 1.1x0.99 6.9x2.459.75.2x42166 8.5x60535 x3.48.471x90x644 43(x6)473 2.3x9.1(2)含有未知数的等式就是方程。(3)tt2t ( )(4)x9是方程9x873的解。1.4x5.8 x4.43.6 x4.37.239.5 8.6x42.14 8.1x353.77
2、.5x13287 8.9x69465 x1.19.889x60x149 23(x3)161 1.9x8.7(1)c22c ( )(2)含有未知数x的算式就是方程。(3)yy2y ( )(4)x9是方程5x243的解。2.3x6 x2.61 x1.69x3.25.1 6x38.4 8.3x4.736.86.5x44541 7.8x71631 x3.79.820x48x612 68(x2)408 3.4x5.2(1)a22d ( )(3)ss2s ( )(4)x8是方程4x626的解。3.9x5.9 x5.18.2 x3.25.8x1.19.4 8.9x2.67 8.9x5.430.24.4x40
3、92 5.9x35378 x2.99.965x25x720 80(x2)320 3.4x6.2(1)m2(3)nn2n ( )(4)x9是方程8x1062的解。1.4x5.4 x7.34.9 x2.29.3x0.15.4 6.2x58.28 5.8x3.942.56.7x71398 8x62338 x1.6891x13x936 85(x5)1190 3x7.6(1)d2=2d ( )(3)8m88(m1) ( )(4)x9是方程4x630的解。4.6x9.5 x2.65.1 x393.88.2 7.8x8.58 4.1x9.86.64.7x50138 4.1x8084 x2.65.274x23x679 16(x5)160 3.9x8.6(3)dd2d ( )(4)x4是方程8x329的解。3.7x5.1 x1.47.5 x0.88.6x4.65.9 6.8x29.24 6.9x3.324.38.2x16394 4x26294 x2.36.225x67x552 14(x4)140 3.4x9.9(1)x2=2x ( )(2)含有未知数x的等式就是方程。(3)5t55(t1) ( )(4)x7是方程4x622的解。4.5x8.1 x25.5 x1.46.8x0.87.8 7.8x59.28 5.