Respostas

2013-10-05T21:22:58-03:00
(x + 2)/(x + 3) = (2/3 * 1,25)
(x + 2)/(x + 3) = 2,5/3
(x + 2)*3 = (x + 3)*2,5
3x + 6 = 2,5x + 7,5
3x - 2,5 = 7,5 - 6
0,5x = 1,5
x = 1,5/0,5
x = 3