Find $x$
$\frac{5 x}{2} + \frac{3 x}{4} \geq \frac{39}{4}$

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Solution

$\frac{5 x}{2} + \frac{3 x}{4} \geq \frac{39}{4}$
$10 x + 3 x \geq 39$
$x \geq 3 x ε [3, \infty)$

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