Respostas

2014-03-18T21:41:48-03:00
-6(3) + 3(3) -  8(3) + 5(3) = 
-18 + 9 - 24 +15 = -18 
 
2014-03-18T21:41:52-03:00
-6a+3a-8a+5a =
- 6(3) + 3(3) - 8(3) + 5(3) =
-18 +9 -24 +15 = 
-9 -24 +15 =
-33 +15 =
-18