Jawabanmu

2014-08-08T21:59:21+07:00
A. -3m + 4n-6 dengan 7n-8m+10
>> -3m+4n-6+(7n-8m+10)
>> -3m+4n-6+7-8m+10
>> -11m+4n+11
b.15a + 7b -5c dari -11a -12b + 13 d
>> -11a-12b+13d-(15a+7b-5c)
>> -11a-12b+13d-15a-7b+5c
>> -26a-19b+5c+13d