Answer:
z = 53
Step-by-step explanation:
Comment
The three angles of any triangle add up to 180o. There are no exceptions to this rule.
Formula
2z + z - 15 + 36 = 180 Combine like terms on the left.
Solution
3z + 21 = 180 Subtract 21 from both sides
3z + 21 - 21 = 180 - 21 Combine
3z = 159 Divide both sides by 3
z = 53
