Pre-Algebra Examples

$9 x - 13 x = 20 - 12$

Step 1

Subtract $13 x$ from $9 x$ .

$- 4 x = 20 - 12$

Step 2

Subtract $12$ from $20$ .

$- 4 x = 8$

Step 3

Graph each side of the equation. The solution is the x-value of the point of intersection.

$x = - 2$

Step 4