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How do you do this help please I am stuck on this for 30 minuets

How do you do this help please I am stuck on this for 30 minuets-example-1

1 Answer

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Rule:  The sum of the interior angles of any triangle is always 180 degrees.  Therefore, x + 3x-5 + x = 180 degrees.  5x = 175, and x = 175/5 (answer)
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