There are 250 pounds on the left side of a barbell and 150 pounds on the right side. Suppose that you must balance the scale by adding 5 pound weights to the left side and exactly the same number of 10 pound weights to the right side. How many bags must you add to each side in order to balance the scale?

250 + 5x = 150 + 10x

- 150. - 150

100 + 5 x. =. 10x

-5x. - 5x

100 = 5x

divide both sides by 5

20 = x

Mathematical form

The answer is:

x= 20