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5x 13 7x 10 99
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5x+13+7x-10=99
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Answer to a math question 5x+13+7x-10=99
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$12x+13-10=99$
$12x+3=99$
$12x=99-3$
$12x=96$
$x=8$
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5x+13+7x-10=99
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