A(12-3p,4) dan B(8,7p-3) dgn m=5 Tentukanlah nilai p Tolong dibantu yah

m = (y₂-y₁)/(x₂-x₁)
5 = ((7p-3)-4)/(8-(12-3p))
5 = (7p-7)/(-4+3p)
-20+15p = 7p-7
15p-7p = -7+20
8p = 13
p = 13/8