Question

find the value of x.

x =

Explanation:

Step1: Set up the equation

Since the angle is a right angle (\(90^{\circ}\)), we have \(4x + x=90\).

Step2: Solve the equation

Combine like - terms: \(5x = 90\). Then divide both sides by \(5\): \(x=\frac{90}{5}\).

Answer:

\(18\)