X = Y + 3 substitusi ke
X + Y < 15
Y+3 + Y < 15
2y < 15-3
2y < 12
y < 12/2
y < 6
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Verified answer
X = Y + 3 substitusi ke
X + Y < 15
Y+3 + Y < 15
2y < 15-3
2y < 12
y < 12/2
y < 6