Respostas

2014-02-18T17:01:47-03:00
17 x -1 = 15 x +3
17 x - 15 x = 3 + 1
2 x = 4
x = 4 / 2
x = 2
2014-02-18T17:02:16-03:00
17x - 1 = 15x + 3
17x-15x= +1+3
2x=4x
 x=  4   = 2                 x=2
       2