Respostas

2014-03-23T23:04:59-03:00
5a - 3b = 
5(-8) - 3(-10) =
-40 + 30 =
-10
2014-03-23T23:10:28-03:00
 5a - 3b
= 5 · (-8) - 3 · (-10)
= -40 + 30
= -10