If a brick weighs as much as a 9-pound rock plus half another brick what does a brick and half weigh?

Answer

Brick = 9 lb rock + ½ brick

Brick= x

Rock= y

x = y + ½(x)

Using rules of algebra move the ½(x) from the right side of the equation to the left side leaving you with:

½(x) = y

½(x) = 9

½(18) = 9

There For:

x + ½(x) = 27.0 pounds