Respostas

2014-06-13T12:00:24-03:00
A) 7x-y+2x-2x
9x-y-2x
7x-y

b) +9p+p+-10p
+9p+p-10p
-1p-p
0

c)-6m-m-4m-2m
-7m-4m-2m
-11m-2m
-13m
5 4 5
2014-06-13T17:16:13-03:00
A)+2x-2x (anula) = 7x-y
b)9p+p= 10p - 10p = 0
c)-6m -m= -7m -4m = -11m -2m= -13m
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