Jawabanmu

Jawaban paling cerdas!
2014-09-03T18:33:33+07:00
1. (13a-3b)+(12a+9b)
     25a+6b
2. (15i+14b+13k)+(-30i-45j+51k)
     -15i+14b-45j+64k
3. (3-17x+35z)+(4x+23y-9)
     -13x+35z+23y-6
  
1 5 1