h(x)=px+q..A. h(4)=-28..B. h(-5)=26..maka h(-12)= ..

h(4) = 4p + q = -28
h(-5) = -5p + q = 26
dieliminasi
9p = -54
p=-6

pakai persamaan pertama
4(-6) + q = -28
-24 + q = -28
q = -4

h(-12) = 6(-12) -4 =-76