Jawabanmu

2014-08-27T18:03:58+07:00
1. -3m+4n-6 dengan 7n-8m+10=(-3m+4n-6)+(7n-8m+10)= -11m+11n+4
2.15a+7b-5c dengan -11a-12b+13d=(15a+7b-5c)+(-11a-12b+13d)= 4a-5b-5c+13d
2014-08-27T18:06:24+07:00
1. (-3m+4n-6)+(7n-8m+10)
= -3m-8m+4n+7n-6+10
= -11m+11n+4

2. (15a+7b-5c)+(-11a-12b+13d)
= 15a-11a+7b-12b-5c+13d
= 4a-5b-5c+3d