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23 July, 12:20

A triangle has one angle measuring 3x degrees. A second angle measures 2x + 20 degrees and the third angle measures 4x - 20 degrees. What is the value of x

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  1. 23 July, 14:04
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    All the interior angles of a triangle always add up to 180 degrees.

    3x + (2x + 20) + (4x - 20) = 180

    3x + 2x + 20 + 4x - 20 = 180

    3x + 2x + 4x + 20 - 20 = 180

    10x = 180

    x = 180/10

    Therefore, x = 18
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