Respostas

2014-09-02T20:01:58-03:00
8x - 9 = 2x + 11
8x - 2x = 11 + 9
6x = 20
x = 20/6 (simplifica por 2)
x = 10/3
5 4 5
2014-09-02T20:23:05-03:00
8x-9=2x+11
8x-2x=11+9
6x=20
x=20/6
x=10/3
1 5 1