Respostas

2014-03-06T17:53:59-03:00
2x + 3 ( x + 1) = 93
2x  + 3x + 3 = 93
5x = 93 - 3
5x = 90
x = 90 / 5
x = 18


prova real
2 . 18 + 3 . ( 18 + 1) = 93
36 + 3 . 19 = 93
36 + 57 = 93
93 = 93
2 2 2