Jawabanmu

2014-09-11T18:44:46+07:00
A) -3a+7a+4b-b-8b+10 = 4a-5b+10
b) 15a-11a+7b-12b-5c+13d = 4a-5b-5c+13d
2014-09-11T18:51:43+07:00
A)-3a+4b-b+7a-8b+10 -3a+7a+4b-8b-b+10 4a-5b+1p