Jawabanmu

2014-08-22T13:49:05+07:00
A. 5a-2a+4b-7b-3b=3a+(-3b-3b)=3a-6b
b. 3p-2p+2q+4q+1+6=1p+6q+7
2014-08-22T13:51:59+07:00