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I dont know how to solve this

I dont know how to solve this-example-1

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Answer:

13) Angle DEG + Angle GEF = Angle DEF

5x - 4 + 7x - 8 = 180

12x - 12 = 180

12x = 192

x = 16

Angle GEF = Angle DEH

7(16) - 8 = 9y + 5

104 = 9y + 5

9y = 99

y = 11

14) Angle R + Angle S = 90°

12x - 3 + 7x - 2 = 90

19x - 5 = 90

19x = 95

x = 5

Angle R = 12(5) - 3 = 60 - 3 = 57°

15) Angle P + Angle Q = 180°

4x + 1 + 9x - 3 = 180

13x - 2 = 180

13x = 182

x = 14

Angle Q = 9(14) - 3 = 126 - 3 = 123°

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