C, because when you add 45 on both sides, and then after that when you have to subtract 15 in both sides, you get 0 = 120.
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The angle is 90° degrees.
Answer:
x = 69
Step-by-step explanation:
Given
35 + x + 76 = 180, that is
x + 111 = 180 ( subtract 111 from both sides )
x = 69
The complex number would turn into 2(cos -pi+i sin -pi)
