Respostas

2014-07-25T21:49:27-03:00
3x-10+13=-2x+28
3x + 2 x = 28 + 10 - 13
5 x = 38-13
5x = 25
x = 25
       5
x = 5
2 5 2
2014-07-25T21:49:52-03:00
3x-10+13=-2x+28
5x=28-3
x=25/5
x=5