Question

1. (6x + 3x = 18)

Explanation:

Step1: Combine like - terms

$6x + 3x=(6 + 3)x=9x$, so the equation becomes $9x = 18$.

Step2: Solve for $x$

Divide both sides of the equation $9x = 18$ by 9. We get $x=\frac{18}{9}$.

Answer:

$x = 2$