Solve $x + y = 8 3 x + 4 y = 25$

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Solution

$x + y = 8 x = 8 - y 3 x + 4 y = 25 3 (8 - y) + 4 y = 25 24 - 3 y + 4 y = 25 y = 25 - 24 y = 1 x = 8 - 1 x = 7$

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Solve for $x$

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