6x-12.6=18怎么解加验算
问题描述:
6x-12.6=18怎么解加验算
答
6x-12.6=18
6x=18+12.6
6x=30.6
x=30.6/6
x=5.1
验算:
将X带入左边=6*5.1-12.6
=30.6-12.6
=18
=右边