Question

what is the value of x?
20
35
60
70

Explanation:

Step1: Use vertical angles property

Vertical angles are equal. So \(3x=x + 40\).

Step2: Solve the equation

Subtract \(x\) from both sides: \(3x-x=x + 40-x\).
We get \(2x = 40\).
Divide both sides by 2: \(x=\frac{40}{2}\).

Answer:

\(20\)