Respostas

2014-03-24T16:23:35-03:00
2x + 12 = 20
10x = 100
..........
1 1 1
2x + 9 = 5
4x + 10 = 3x – 45
x + 6 = 2x + 12
2*(x + 2) = 3*(x – 3)