4(X+2)=5-(X-2)等于多少?

问题描述:

4(X+2)=5-(X-2)等于多少?
4(X+2)=5(2-x)等于多少?

4(X+2)=5-(X-2)
4x+8=5-x+2
4x+x=7-8
5x=-1
x=-1/5
4(X+2)=5(2-x)
4x+8=10-5x
4x+5x=10-8
9x=2
x=2/9