# How do you simplify (x^2 + 2x)/(5x+10)?

$\frac{x \left(x + 2\right)}{5 \left(x + 2\right)}$
Now, we can cancel what's both on numerator and denominator, as when a number/equation divides itself, the result is $1$.
$\frac{x \cancel{\left(x + 2\right)}}{5 \cancel{\left(x + 2\right)}} = \textcolor{G r e e n}{\frac{x}{5}}$