Dave had more money than Jerry. After Dave gave Jerry $140, they have the same amount of money. How much more money did Dave have than Jerry at first? Ans: $ ___

1. Understand the relationship between the amount transferred and the initial difference

When Dave gives Jerry $\char36{}140$, Dave's amount decreases by $\char36{}140$ and Jerry's amount increases by $\char36{}140$. For them to have the same amount in the end, the initial difference must be twice the amount transferred.

2. Calculate the initial difference

$140 \times 2 = 280$