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Subtracting the second equation from first:

3x - y = 25

3x + 4y = 5

0x - 5y = 20

5y = -20

y = -4

Plugging y = -4 into either equation gives us x = 7,

So x = 7 and y = -4

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Q: What is the solution for 3x-y equals 25 and 3x plus 4y equals 5?
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