Answer:
x=1, y=1. (1, 1).
Explanation:
4x+5y=9
-x+5y=4
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4(-x+5y)=4(4)
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-4x+20y=16
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25y=25
y=25/25
y=1
4x+5(1)=9
4x+5=9
4x=9-5
4x=4
x=4/4
x=1
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