Tim and Sally sold 395 homes. Tim sold 4 times as many as Sally. How many homes did each sell?
Let x = number of homes Tim sold
Let y = number of homes Sally sold
x = 4y because Tim sold 4 times as many homes as Sally
x + y = 395 because together they sold a total of 395 homes
Now we solve the system of equations by substituting x = 4y into x + y = 395
x + y = 395
(4y) + y = 395
5y = 395
y = 395/5
y = 79
x = 4(79) = 316
Tim sold 316 homes
Sally sold 79 homes
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