Respostas

2014-05-20T18:22:14-03:00
7x= 49x + 4x - 25 + 100 - 18
7x= 49x + 4x + 57
49x + 4x - 7x = -57                 (isolei o 57)
46x = -57
X= \frac{-57}{46}
X= -1,23913