Question

what is the value of x? (x + 40)° (3x)° o 20 o 35 o 60 o 70

Explanation:

Step1: Set up equation

Since vertical angles are equal, we have $x + 40=3x$.

Step2: Solve for x

Subtract $x$ from both sides: $40 = 3x - x$.
Simplify the right - hand side: $40=2x$.
Divide both sides by 2: $x=\frac{40}{2}=20$.

Answer:

20