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Savatey [412]
3 years ago
9

TIVE FEMANDING

Mathematics
1 answer:
Over [174]3 years ago
5 0

Answer:

<em>x = 40</em>

Step-by-step explanation:

<u>Lines and Angles</u>

The image shows the shape of a triangle, whose base is extended to form a linear pair of angles.

Recall that two linear angles add up to 180°, this forms the equation:

x + 4x - 20 = 180

Simplifying:

5x = 180 + 20 = 200

x = 200/5 = 40

x = 40

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