THE GAME SHOW
In an amazing finish, Susan then landed on a “Double Your Prize” square and answered the corresponding math question correctly. She instantly became the show’s biggest winner ever, earning twice the amounts of all her previous prizes.
A week later,
Think of Susan's prizes as variables.
If Susan's total prize was doubled, each one the smaller prizes (or variables) must be doubled.
She should have received two sports cars and ten pieces of furniture.