解方程4x-5×6=12;8x-3x=15.6;30×(x÷4)=60;7.2×0.5-3x=1.2.

问题描述:

解方程
4x-5×6=12;
8x-3x=15.6;
30×(x÷4)=60;
7.2×0.5-3x=1.2.

(1)4x-5×6=12           4x-30=12        4x-30+30=12+30         ...