Question

solve and graph two - step equations and two - step inequ
$5x + 2x - 3 = 18$
$x = $______

Explanation:

Step1: Combine like terms

$5x + 2x = 7x$, so the equation becomes $7x - 3 = 18$

Step2: Add 3 to both sides

$7x - 3 + 3 = 18 + 3$
$7x = 21$

Step3: Divide by 7 on both sides

$\frac{7x}{7} = \frac{21}{7}$
$x = 3$

Answer:

$x = 3$

For the graph: The number line has a closed dot at 3, which correctly represents the single solution $x=3$.