exam Maths Puzzle Numerical Ability

An angle measures 12 degrees less than three times its supplement. Find the measure of the angle

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exam Other Question

y=3/4(x-1)2+5 2/x^2-16y^2 - 1/x^2-3xy-4y^2
This is a fraction and I need to perform the indicated operations. I am lost could you please help?