The sum of the measures of Angle A and Angle

The sum of the measures of Angle A and Angle B is 180°.

•    The measure of Angle A is (7x + 52)° 

•    The measure of Angle B is (13x – 12)°

What is the value of x?

A: x = 20

B: x = 140

C: x = 64

D: x = 7

 

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