Math 7B Unit 3 Study Guide
9. Two supplementary angles have measures mLEFG = 112° and m<GFH = (2n - 12)°. What is the equation to solve for n?
(2n- 12)° +
112° = 180°
To solve for n, we can set up the equation:
2n - 12 + 112 = 180
Combine like terms:
2n + 100 = 180
Subtract 100 from both sides:
2n = 80
Divide both sides by 2:
n = 40
Therefore, the equation to solve for n is 2n - 12 + 112 = 180, and n = 40.