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Gennadij [26K]
3 years ago
12

I don’t pay attention in class

Mathematics
2 answers:
zvonat [6]3 years ago
8 0
Pay attention then lol.
Elanso [62]3 years ago
8 0

Step-by-step explanation:

All the angles in a triangle add up to 180 degrees

x-22 + 3x+19 + x-17 = 180

x+3x+x-22+19-17=180

5x - 20=180

5x=180+20

5x=200

5x/5=200/5

x=40

Angle A= x-22

Substitute x in the question

= 40 - 22

=18

Therefore angle A is 18 degrees

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