Respostas

2014-02-13T18:12:46-02:00
-x+2x+3x=100+15-5-10
4x=100
x= 100/4
x = 25
1 3 1
2014-02-13T18:14:03-02:00
10-X+5+2X = 100 -3X+15
15+X = 115-3X
X+3X = 115-15
4X = 100
x=25
2 5 2