Question

solve the equation and check your solution.
$4x - 9 = 11$
$x = \square$

Explanation:

Step1: Add 9 to both sides

$4x - 9 + 9 = 11 + 9$
$4x = 20$

Step2: Divide by 4 on both sides

$\frac{4x}{4} = \frac{20}{4}$
$x = 5$

Step3: Verify the solution

Substitute $x=5$ into original equation:
$4(5) - 9 = 20 - 9 = 11$, which matches the right-hand side.

Answer:

$5$