Answers

2016-07-26T14:32:30+08:00
5p+12-(7p+2)=2p-1-(5p+12)
5p+12-7p-2=2p-1-5p-12
-2p+10=-3p-13
-2p+3p=-13-10
p=-23

7p+2 5p+12 2p-1
7(-23)+2 5(-23)+12 2(-23)-1
-161+2 -115+12 -46-1
-159 -103 -47

-159,-103,-47
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