Two buckets hold 5L and 7L. How to use these buckets to measure 2 liters of water pouring from the tap?

Two buckets hold 5L and 7L. How to use these buckets to measure 2 liters of water pouring from the tap? how to measure: 4L? 6 l? 1 l? 3 l?

1) To measure 2 liters of water, you must first pour a full 7 liter bucket, and then pour water from it into a 5 liter bucket, filling it to the end, and then 7 – 5 = 2 liters will remain in the 7 liter bucket.
Based on this, we will do the following steps to get the required amount of liters:
2) 7 + 7 – 5 – 5 = 4 y.
3) 7 * 3 – 5 * 3 = 6L.
4) 7 * 3 – 5 * 4 = 1L.
5) 5 + 5 – 7 = 3L.