3(x-7)=8.7 用简便方法计算3(x-7)=8.7 用简便方法计算
问题描述:
3(x-7)=8.7 用简便方法计算
3(x-7)=8.7 用简便方法计算
答
3(x-7)=8.7
x-7=2.9
x=9.9