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Answer:
m<N = 51
Step-by-step explanation:
The given shape is a parallelogram
suppose KL || NM:
We can write the following equation
m<K = m<M and
8x + 17 = 12x - 39 transfer like terms to the same side of the equation
17 + 39 = 12x - 8x
56 = 4x divide both sides by 4
14 = x
Now to find the measure of n:
again suppose KL || NM then m<K + m<N = 180
m<K = 8*14 + 17 since we found x = 14
8*14 + 17 = 129 and m<N
180 - 129 = 51