We know that the sum of all angle measures in a trapezoid is 360* (* means degrees)
Therefore we can construct the equation
(X+28)+(x)+(4x-14)+(4x-14)= 360
Now add like terms
10x = 360
And divide by the coefficient of X (aka 10)
X= 36
I think it’s C not sure tho

This cannot be simplified any further.
Have a good one!
Answer:
its 60
Step-by-step explanation:
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