解方程. 5x+15=60 x÷1.5-1.25=0.75 3.5-5x=2 4x-1.3×6=2.6 3×7+4x=12.5 120-9x=1.2×6.25.
问题描述:
解方程. 5x+15=60 |
x÷1.5-1.25=0.75 |
3.5-5x=2 |
4x-1.3×6=2.6 | 3×7+4x=12.5 | 120-9x=1.2×6.25. |
答
①5x+15=60 5x+15-15=60-15 5x=45 5x÷5=45÷5 x=9; ...