1.) Form Equation. Since M is parallel to N and both lines are being cut by transversal T, we can say that the alternate exterior angles are congruent, so we know that 7x - 3 = 6x + 17.
2.) Isolate x. Move all the x to one side and all of the numbers to another side by subtracting by 6x on both sides and adding by 3 on both sides. You will get that x = 20 degrees.
