Precalculus Examples

$x + y = - 2$ , $y = x - 7$

Step 1

Subtract $x$ from both sides of the equation.

$y = - 2 - x$

$y = x - 7$

Step 2

Create a graph to locate the intersection of the equations. The intersection of the system of equations is the solution.

$(\frac{5}{2}, - \frac{9}{2})$

Step 3