Question

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Answer 1

1.

x + x - 10 = 40

2x = 40 + 10

2x = 50

x = 50/2

x + 25°

5.

120 + x + x = 180

2x = 180 - 120

2x = 60

x = 30°

6.

65 + 70 = δ

135° = δ