Hello, Rimas!

You can baby-talk your way through this one . . .

In the arithmetic sequence: , what is the value of ?

In an arithmetic sequence, the terms are "equally spaced".

Since the distance from the first to last is 24, they must be 6 units apart.

. . . . . . . . .

We have: .

. . . . . . . . . . .

Got it?