Question

Johnny’s Donut Shop is running a “buy one get one 50% off” sale today. During the sale, Laine bought 4 glazed donuts for only $3.78. What is the regular price for one glazed donut at Johnny’s Donut Shop?

Answer 1

Explanation:

Set up a simple system.

Price = 4x where x = price of donut

For the sale, the price = 3.78, but the x value is 0.5x as it is half off.

$3.78 = 4(0.5x)

Solve for x =$1.89

Therefore, the original price of the donuts were $1.89.

Check by doing 4 x 50%(.5) of 1.89 which equals 3.78!