Question

find X in the following figures. plz plz. only. 1. and 3. plzzzzz
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Answer 1

2.5x+3x-20=180

8x=200

x=25degree

3. 7x+14+4x+89=180

11x+103=180

11x=180-103

x=77/11

x=7 degree

1. x=110degree