Mike bought 4 new baseball trading cards to add to his collections. There are now only twenty nine cards left.
How many cards did Mike start with?
If Mike started with x number of baseball trading cards, and he bought 4 new cards, then the total number of cards he had would be x + 4.
We also know that after buying the new cards, there were only 29 cards left.
So we can set up an equation:
x + 4 = 29
To solve for x, we can subtract 4 from both sides:
x = 25
Therefore, Mike started with 25 baseball trading cards.