Precalculus Examples

$x + y = - 3$ , $y = x - 7$

Step 1

Subtract $x$ from both sides of the equation.

$y = - 3 - x$

$y = x - 7$

Step 2

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

$(2, - 5)$

Step 3