Question

solve for y. y = 10 y = 20 y = 60 y = 120

Explanation:

Step1: Use the property of supplementary angles

The sum of \( 120^{\circ} \) and \( 6y^{\circ} \) is \( 180^{\circ} \) (supplementary angles). So, \( 120 + 6y=180 \).

Step2: Solve the equation for \( y \)

Subtract \( 120 \) from both sides: \( 6y=180 - 120 \), which simplifies to \( 6y = 60 \).
Divide both sides by \( 6 \): \( y=\frac{60}{6}=20 \).

Answer:

B. \( y = 20 \)