Jawabanmu

2014-08-23T11:14:49+07:00
A. (-3m+4n-6)-( 7n-8m+10)
= (-3m)+4n-6-7n+8m-10
= (-3m)+8m+4n-7n-6-10
= 5m+(-3n)-(-4)
= 5m+(-3n)+4
b. (15a+7b-5c)-(-11a-12b+13d)
= 15a+7b-5c+11a+12b-13d
= 15a+11a+7b+12b-5c-13d
= 26a+19b-5c-13d
2014-08-23T13:49:01+07:00
1. (-3m+4n-6)-(7n-8m+10)
=-3m+4n-6-7n+8m-10
=-3m+8m+4n-7n-6-10
=5m-3n-16

2. (15a+7b-5c)-(-11a-12b+13d)
=15a+7b-5c+11a+12b-13d
=15a+11a+7b+12b-5c-13d
=26a+19b-5c-13d
maaf kalo salah :D