For the angles to be parallel, the value of x is of x = 28, and the angle is of 132º.
The angles need to have the same measure. Their measures are of 3x + 48 and 6x - 36, hence:
3x + 48 = 6x - 36
3x = 84
x = 84/3
x = 28.
Hence the measure of the angle is:
3x + 48 = 3 x 28 + 48 = 132º.
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