x-12=2x-20怎么求X?
问题描述:
x-12=2x-20怎么求X?
答
x-12=2x-20
x-2x=12-20
-x=-8
x=8
x-12=2x-20怎么求X?
x-12=2x-20
x-2x=12-20
-x=-8
x=8