Respostas

2013-11-23T16:26:13-02:00
4A+3B=8
8 - 3b = 4a
(
8 - 3b) + 3b
8 - 6b
b = 2

4a + 3 * 2 = 8
4a + 6 = 8
8-6 = 4a
-2 = 4a
a = 2/4
a = 1/2

a + b = p
1/2 + 2 = 1 + 4 = 5
                 2       2

P vale 5/2