Answer
$\frac{50x+3}{5x^2}$
Work Step by Step
$5x^2=5x\cdot x$, so LCD$=5x^2$, thus $\frac{3}{5x^2}+\frac{10}{x}=\frac{3+10\cdot5x}{5x^2}=\frac{50x+3}{5x^2}$
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