Asign says that the price marked on all music equipment is 30% off rhe original price. you buy an electric guitar for the sale price of $315. what is the original price?

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180

faster, im not sure why but i know it is faster