Answer:
x = 15, y = 10
Explanation:
x + y = 25
y = 25 - x
4x + 2y = 80
4x + 2(25 - x) = 80
4x + 50 - 2x = 80
2x + 50 = 80
2x = 30
x = 15
15 + y = 25
y = 10
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