# How do you solve -5m+8=18 in two ways?

Dec 6, 2016

$m = - 2$

#### Explanation:

1.) One way...

$- 5 m + 8 = 18$

Subtract both sides by 8.

$- 5 m + 8 - 8 = 18 - 8$
$- 5 m = 10$

Divide both sides by $- 5$

$\frac{- 5 m}{-} 5 = \frac{10}{-} 5$

$m = - 2$

2.) Another way...

$- 5 m + 8 = 18$

Multiply both sides by $- 1$

$\left(- 1\right) \cdot \left(- 5 m + 8\right) = \left(- 1\right) \cdot 18$

$5 m - 8 = - 18$

$5 m - 8 + 8 = - 18 + 8$
$5 m = - 10$
$\frac{5 m}{5} = \frac{- 10}{5}$
$m = - 2$