Find the Measure of Angle C in a Triangle

In a triangle, the measures of the angles are represented as follows: angle A is $(3x + 10)^{ ext{o}}$, angle B is $(4x - 20)^{ ext{o}}$, and angle C is $(2x + 30)^{ ext{o}}$.

Knowing that the sum of the interior angles of any triangle is always $180^{ ext{o}}$, you need to find the measure of angle C. What is the value of angle C?