What is the value of x in this equation?

4x + 2 – (3 + 3x) = 7

In the triangle abc< angle c is a right angle. find the value of the trig function indicated. find tan a if a =12, b=5 a. 13/12 b. 12/13 c. 5/12 d.12/5

Solve the system of equations. y= 2x y= x^2 - 15

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .