system of equations solving with only that information

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Hi would would I go around to solve the following, there is no other information stat is given other than the fact that i have already expanded this from this

$(25-y)(x+8)=523$

$25x-8y=323$

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Hint: You can rewrite the second equation as $y=\frac 18(25x-323)$, substitute that into the first and you will have a quadratic equation. It will give you two values for $x$, which you can plug into the second to find $y$.