(5x-12)÷5=7×(x+12)
问题描述:
(5x-12)÷5=7×(x+12)
答
(5x-12)/5=7(x+12)
5x-12=35(x+12)
5x-12=35x+420
5x-35x=420+12
-30x=432
x=-14.4