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uranmaximum [27]
3 years ago
13

4. x = a. 20° b. 240 C. 28° (5x) 120° d. 30°

Mathematics
1 answer:
MaRussiya [10]3 years ago
6 0

An exterior angle equals the sun of the two opposite inside angles:

5x = 120 + x

Subtract 1 x from both sides:

4x = 120

Divide both sides by 4:

X = 30

The answer is D. 30

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