33 !
two angles are supplementary. one angle measures 2x, and the other angle measures 3x - 15. which equation can you use to find the measure of each angle?

a. 2x + 3x - 15 = 90°
b. 2x - 3x - 15 = 180°
c. 2x - 3x - 15 = 90°
d. 2x + 3x - 15 = 180°

Problem number 26 of the rhind papyrus says: find a quantity such that when it is added to of itself the result is a 15. the modern day equation that models this problem is x + x = 15. what is the solution to the equation? x = 10 x = 12 x = 15 x = 30