Respostas

2013-11-14T11:18:20-02:00
2(x+5)-3(5-x)=5
2x+10-15+3x=5
2x+3x = 5+15-10
5x=20-10
x=10/5 --->>> x =2
2013-11-14T11:20:24-02:00
2x+10-15+3x=5
5x-5=5
5x=5+5
5x=10
x=10\5
x=2