The cashier got 1/3 of the stamps and the secretary got 1/5 of the stamps. The secretary got 40 fewer stamps than the cashier. How many did the cashier receive?
solve for x
x/3 - x/5 = 40
times 15
5x - 3x = 600
etc.
x/3 - x/5 = 40
times 15
5x - 3x = 600
etc.