Respostas

2014-02-19T23:47:41-03:00
2x+10=-2x-10
2x+2x=-10-10
4x=-20
X=-20/4
X=-5
2014-02-19T23:48:41-03:00
2x+10=-2x-10
2x+2x=-10-10
4x=-20
x=-20/4
x= -5