A backyard deck is in the shape of an isosceles triangle with a base of 20 feet. The perimeter of the deck is 48 feet. How long is each of the equal sides of the deck?

Answer 1

48-20 = 28

28/2 = 14 = the other two sides' lengths

Or maybe

if the base is one of the two sides that are the same, then

48-40 = 4, so the other two sides are 4 and 20

but the way the question is phrased, go with 14 and 14