Respostas

2013-06-23T19:26:04-03:00

12xy+7xy-2xy

a)16xy

 

3(5a-b)+a+2b

15a-3b+a+2b

b) 16a-b

 

 

-2n+5-3n

-5n+5=0

-5n=-5

c) n=-5/-5=1

 

p-2+2p+5p

6p-2=o

6p=2

d) p=2/6

1 4 1
2013-06-23T19:36:12-03:00

a)17xy

b)15a - 3b +a +2b = 16a -b

c)-5n + 5

d)8p - 2