当x的值是_时,5x+0.2=0.4;当m的值是_时,2m=m2.

问题描述:

当x的值是______时,5x+0.2=0.4;当m的值是______时,2m=m2

(1)5x+0.2=0.4    5x+0.2-0.2=0.4-0.2            5x=0.2         5x÷5=0.2÷5 &nb...