I solved this by hand first, then cymath, then Wolfram alpha. we all agree the solution to the equation involved is x=-3 however -3 is not a multiple of 6. if you plug it in you get a solution of 24 but I don't consider this to be a valid question.
Answer:
x= 68 degrees
Step-by-step explanation:
every triangle is = to 180 degrees so to find x add 75+37=112
then take 180-112=68
The correct option is: 53.9°
<em><u>Explanation</u></em>
According to the below diagram,
is acute triangle, in which
and 
If we <u>apply cosine rule</u> here, then we will get.....

Now, plugging the given values, we will get....

So, the measure of
is 53.9°
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Anything more than that, Classy Elegance would cost less.