Alex has 175 baseball cards. rodney has 3 times as many baseball cards as alex. how many fewer cards does alex have than rodney?

Since Alex has 175 baseball cards, and Rodney has 3 times as much, we could easily turn that into an equation.

175 * 3 = 525

Now, just subtract the amount of cards Alex has from the amount Rodney has.

525 - 175 = 350

Hope this helps! :)