Can you figure it out in one try with no second guesses?

Step 1 – First equation

Three identical pairs of earbuds add up to 30.

If:
🎧 + 🎧 + 🎧 = 30
Then: One pair of earbuds = 10

No trick here yet.

Step 2 – Second equation

Two people + one pair of earbuds = 20

We know earbuds = 10, so:
🧑 + 🧑 + 10 = 20
🧑 + 🧑 = 10
One person = 5

Still clean.

Step 3 – Third equation