Question

Which is the value of x?

Answer 1

lower Right.

Explanation:

Remark

The two angles share the same side of vertically opposite angles. That makes them supplementary which means the two angles add to 180 degrees.

Equation

4x + 8x + 12 = 180 Combine like terms on the left

Solution

• 12x + 12 = 180 Subtract 12 from both sides
• 12x = 180 - 12 Combine
• 12x = 168 Divide by 12
• x = 168/12
• x = 14