Gimana ya kira2 cara jalannya ini (materi program linier pengoptimalan)

Program Linier

x + 4y = 120
A(0,30)
B(120,0)

x + y = 60
C(0,60)
D(60,0)

titik potong
x + y = 60
x + 4y = 120
E(40,20)

Titik yg memenuhi soal :
A , D , dan E

f(x,y) = 10x + 20y
f(0,30) = 10.0 + 20.30 = 600
f(60,0) = 10.60 + 20.0 = 600
f(40,20) = 10.40 + 20.20 = 800

Maksimum :
f(40,20) = 800 ✔