Question

Lucas swims every day. He swims 3 fewer laps today than twice the number of laps he swam yesterday. Write an expression for the number of laps he swam today.

Answer 1

T = 2L - 3

Explanation:

Let's call L the amount of laps he swam yesterday, and T for laps today:

T = 2L - 3

Let's look at this in depth:

We start with what we are trying to find, or the variable T for laps today. Then, we know that he swam 3 fewer laps than twice the laps of yesterday. To find the amount of laps, we would have to multiply yesterday's laps by 2, and subtract 3 from that.

That's how we get: T = 2L - 3