If three empanadas and two drinks cost $9, and four empanadas and one drink costs $9.50, how much does a drink cost?
1 answer:
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Answer:
y = 6
Step-by-step explanation:
y^2 + 36y - 252 = 0
(y-6)(y+42) = 0
y = 6 (accettable)
y = -42 (not accettable)