# How do you simplify \frac { - 21( 5) + 5( 5) } { - 7- ( - 3) }?

Nov 20, 2017

$20$
$\frac{- 21 \left(5\right) + 5 \left(5\right)}{- 7 - \left(- 3\right)} = \frac{- 105 + 25}{- 7 + 3} = \frac{- 80}{-} 4 = \frac{80}{4}$
Simplify by dividing both the numerator and denominator by $4$
$\frac{80 \div i \mathrm{de} 4}{4 \div i \mathrm{de} 4} = \frac{20}{1} = 20$