Question

solve for the value of r.
answer attempt 1 out of 2
r =

Explanation:

Step1: Set up the equation

Since the two angles are vertical angles, they are equal. So \( 5r + 8=7r - 8 \).

Step2: Solve for \( r \)

Subtract \( 5r \) from both sides: \( 8 = 2r-8 \).
Add \( 8 \) to both sides: \( 16 = 2r \).
Divide both sides by \( 2 \): \( r = 8 \).

Answer:

\( r = 8 \)