Respostas

2014-05-06T18:19:15-03:00
1) 5x-25=0
5x = 25
x = 25/5
x = 5

2)6x+18=0
6x = -18
x = -18/6
x=-3
2014-05-06T18:31:59-03:00
5x - 25 = 0  5x = 25 x= 25/5    x= 3

6x + 18 = 0  6x = -18  x= -18/6  x= - 6