tolong donk tapi pakai caranya

f(x) = px + q
f(-2) = -2p + q = -13
f(3) = 3p + q = 12
eliminasi Q
-2p - 3p = -13 - 12
-5p = -25
p = 5
subtitusi
3p + q = 12
3.5 + q = 12
q = 12 - 15 = -3

f(5) = 5.p + q
5.5 + (-3) = 22