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12-04-2017
Mathematics

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12-04-2017

Since they are opposite angles about the intersection of two straight lines they are equal angles....

5x+12=6x-10 subtract 12 from both sides

5x=6x-22 subtract 6x from both sides

-x=-22 divide both sides by -1

x=22°

So those angles are 5*22+12=122°

Now HJI is an adjacent angle so it is 180°-122°=58°

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