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The measures of the angles of a triangle are shown in the figure below.  Solve for x.

 

 Mar 20, 2021
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Hi guest!

Knowing that a triangle sums up to 180, you can just set all the equations to 180 which will be:

(9x-11)+80+57=180

solving for x, it will be 6

 Mar 20, 2021

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