# How do you solve 2x - y = -5 and x + 1 = 0?

Sep 16, 2015

$x = - 1$ and $y = 3$

#### Explanation:

First we look at an equation with one unknown only,
To find what is $x$;

$x + 1 = 0$

$x = - 1$

Then, we substitute $x = - 1$ into $2 x - y = - 5$ to find $y$;

$2 x - y = - 5$

$2 \left(- 1\right) - y = - 5$

$- 2 - y = - 5$

$- y = - 5 + 2$

$- y = - 3$

$y = 3$