Respostas

2014-03-05T20:46:53-03:00
2x+3=13
2x=13-3
2x=10
x=10/2
x=5
1 5 1
2014-03-05T20:47:31-03:00
2x + 3 = 13
2x = - 3 + 13
2x = +10
x = 10/2
x = 5
1 5 1