### Home > CAAC > Chapter 4 > Lesson 4.1.1 > Problem 4-4

4-4.

Think of Susan's prizes as variables.

$12,500 = *x*

sports car = *y*

airline tickets = *z*

furniture = *v*

If Susan's total prize was doubled, all the smaller prizes (or variables) must be doubled.

2(*x* + *y* + *z* + *v*) = 2*x* + 2*y* + 2*z* + 2*v*

She should have received two sports cars and ten pieces of furniture.