解方程. 1.56x+3.16=7.84 1.6x+2x×0.7=18 3x-75=64.5 (x-3)÷4=7.2 0.7×3-0.3x=0.06 x÷9=7.5.
问题描述:
解方程. 1.56x+3.16=7.84 |
1.6x+2x×0.7=18 | 3x-75=64.5 |
(x-3)÷4=7.2 | 0.7×3-0.3x=0.06 | x÷9=7.5. |
答
(1)1.56x+3.16=7.84 1.56x+3.16-3.16=7.84-3.16 1.56x=4.68  ...