Jawabanmu

Jawaban paling cerdas!
2014-09-07T19:06:04+07:00
13a+12a+8b+9b
25a+17b
hasil akhir 25a+17b
kurungnya ga berfungsi ?
(13a + 8b) + (12a + 9b) =
2014-09-07T19:06:48+07:00
( 13a + 8b ) + ( 12a + 9b )
( 13a +12 a ) + ( 8b + 9b )
25a + 17b