3 years ago

Answer to the question

Mathematics

1 answer:

KonstantinChe [14]3 years ago

4 0

Answer:

Step-by-step explanation:

Step-by-step explanation:

AB//CD (Opposite sides of parallelogram are parallel)

Angle A + Angle B = 180 (Sum of interior angles=180)

179 + 3x - 20 = 180

3x - 20 = 180 - 179

3x - 20 = 1

3x = 1 + 20

3x = 21

x = 21/3

x = 7

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