Precalculus Examples

$y = \frac{1}{4} x + 2$ , $2 x + y = - 7$

Step 1

Combine $\frac{1}{4}$ and $x$ .

$y = \frac{x}{4} + 2$

$2 x + y = - 7$

Step 2

Subtract $2 x$ from both sides of the equation.

$y = - 7 - 2 x$

$y = \frac{x}{4} + 2$

Step 3

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

$(- 4, 1)$

Step 4