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18 September, 02:13

In the diagram, m angel 8 = 4x°, m angle 7 = 30°, and m angle 9 = (6x - 20). Find the value of x.

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  1. 18 September, 02:31
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    17

    Step-by-step explanation:

    4x+30 + (6x-20) = 180

    4x+30+6x-20=180

    10x+10=180

    10x=170

    x=170/10

    so, x=17
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