Answer
$\frac{47x}{60}$
Work Step by Step
Denominators: 5 and 12
LCD: (5)(12)
$\frac{x}{5}+\frac{7x}{12}=\frac{x(12)}{5(12)}+\frac{7x(5)}{12(5)}=\frac{12x}{60}+\frac{35x}{60}=\frac{47x}{60}$
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