Jawabanmu

2014-08-27T20:24:13+07:00
3(5-1) = 3(4) =12
(3x5)-(3x1) = 15-3 =12
2014-08-27T20:24:38+07:00
A) p(q-r)= 3(5-1) = 15-3= 12
b) (pq)-(pr)= (3.5)-(3.1)= 15-3= 12