Dave picked some lemons, gave 10 away, and had 30 left. We need to find the equation that can be used to determine $t$, the total number of lemons Dave picked initially.

1. Problem Description

Dave picked some lemons, gave 10 away, and had 30 left. We need to find the equation that can be used to determine $t$, the total number of lemons Dave picked initially.

2. Solution Steps

Let $t$ be the total number of lemons Dave picked.

Dave gave away 10 lemons, so we subtract 10 from $t$.

After giving away the lemons, Dave had 30 lemons left. This gives us the equation:

$t - 10 = 30$

3. Final Answer

$t - 10 = 30$