Hockey card donation

George donated three-fifths of his collection of hockey players to his friend Josef. He has 100 cards left. How many cards did George initially have in his collection before the donation?

Final Answer:

x =  250

Step-by-step explanation:


x - 3/5 x = 100

x - 3/5·x = 100

2x = 500


x = 500/2 = 250

x = 250

Our simple equation calculator calculates it.



Help us improve! If you spot a mistake, please let let us know. Thank you!







Tips for related online calculators
Need help calculating a sum, simplifying, or multiplying fractions? Try our fraction calculator.
Do you have a linear equation or system of equations and are looking for a solution? Or do you have a quadratic equation?

You need to know the following knowledge to solve this word math problem:

Related math problems and questions: