sederhanakan hasil dari (9p+8q-r)+(12p-3q+5r) pake cara bro.....

(9p + 8q - r) + (12p - 3q + 5r)
= 9p + 8q - r + 12p - 3q + 5r
= 9p + 12p + 8q - 3q - r + 5r
= 21p + 5q + 4r

(9p+8q-r)+(12p-3q+5r)
=9p+8q-r+12p-3q+5r
=9p+12p+8q-3q-r+5r
=21p+5q+4r
Maaf klo salah.