Jawabb dongg plisss gue mohonn :D

(a, 4) (3a,10)
m=2

m=(10-4)per(3a-a)
2 =(10-4)per(3a-a)
2(3a-a) = 10-4
6a-2a   = 6
4a       = 6
a         = 6per4