Pls help find x of this and help me understand how to find it :)

asked Apr 12, 2021 195k views

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X=-8
Have a nice day :)

Spraff answered Apr 13, 2021

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The answer is -8 the angles of the triangle are 180 so
180=42+x+76+x+78
180=2x+196
2x=-16
x=-8

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