Angle 1 and Angle 2 are vertical angles. Angle 1 has a measure of (7x - 18)⁰ and Angle 2 has a measure of (6x + 7)⁰ What is the value of x?​

Just tell me how to set up the equation.

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?

Two numbers have a sum of -19. one number is x. what expression represents the other number?