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18 October, 17:13

The angles of a triangle are 99º, 3xº, and x + 5º. What is the value of x? Enter your answer in the box.

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  1. 18 October, 20:11
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    (99) + (3x) + (x + 5) = 180 because the always in a triangle must always add up to 180.

    Now just have to isolate x:

    First add the like terms:

    104 + 4x = 180

    Subtract 104 on both sides:

    4x = 76

    Divide by 4:

    x = 19
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