Jawabanmu

Jawaban paling cerdas!
2014-09-03T19:53:34+07:00
2014-09-03T20:02:16+07:00
A. (-3m+4n-6)-(7n-8m+10)
     -3m+8m+4n-7n-6+10
      5m       - 3n    -6+10
B. (15a+7b-5c)-(-11a-12b+13d)
     15a+11a+7b+12b-5c+13d
      26a       +19b     -5c+13d