Question 1187155
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In any parallelogram, the opposite angles are congruent.


So, you can write this equation


    m (< A) = m (< C)    or

    4x + 6 = 6x - 8.


Simplify and find x

     6 + 8 = 6x - 4x

       14  =    2x

        x  =     14/2 = 7.


Now calculate the angles  m (< A) = 4x + 6 = 4*7 + 6 = 34  degrees

                          m (< B) = 180 - 34 = 146  degrees.
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Solved, answered and explained.