Respostas

2014-04-02T23:26:56-03:00
A - b + 3c     a = 1 b = 3 e c = 5
1-3 + 3.5
1 - 3 + 15= 13
2014-04-02T23:27:02-03:00
A = 1 b = 3 c = 5
1 - 3 + 3.5
-2 + 15 = 13 Somente substituir!!
1 5 1