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