Question

$2sqrt{x}-6=18$

Explanation:

Step1: Isolate the radical term

Add 6 to both sides.
$2\sqrt{x} = 18 + 6$
$2\sqrt{x} = 24$

Step2: Solve for $\sqrt{x}$

Divide both sides by 2.
$\sqrt{x} = \frac{24}{2}$
$\sqrt{x} = 12$

Step3: Eliminate the square root

Square both sides.
$(\sqrt{x})^2 = 12^2$
$x = 144$

Answer:

$x = 144$