解方程. 9(x+2.7)=75.6 4.07x一2.57x=2.25 5x+1.3×0.6=21.48.
问题描述:
解方程.
9(x+2.7)=75.6
4.07x一2.57x=2.25
5x+1.3×0.6=21.48.
答
(1)9(x+2.7)=75.6, 9(x+2.7)÷9=75.6÷9, x+2.7=8.4, &nbs...