4. Joe spent ¼ of his paycheck on Monday and 3/7 of it on Tuesday. He spent the rest of his paycheck over the next 3 days. If Joe spent $18.00 on each of the 3 days, what was the amount of the paycheck?

Solution:

The amount of the paycheck is x

x - (1/4)x-(3/7)x = 18*3

So

x = 168

So the amount of the paycheck is $168