tolong dibantu . untuk belajar

z = 2x + 3y

3x + 2y ≤ 15
x = 5, y = 15/2 (7.5)

2x + 4y ≤ 18
x + 2y ≤ 9
x = 9, y = 9/2 (4.5)

3x + 2y = 15
x + 2y = 9
--------------------- -
2x = 6
x = 3

x + 2y = 9
3 + 2y = 9
2y = 6
y = 3

A = 5,0 = 2(5) + 3(0) = 10
B = 0,4.5 = 2(0) + 3(4.5) = 13.5
C = 3,3 = 2(3) + 3(3) = 15

Nilai maksimum = 15