Question
At first, Tank X and Tank Y contained 0.4 ℓ and 4.3 ℓ of water respectively. Some water from Tank Y was poured into Tank X with no water spilling over. In the end, there was as much water in Tank X as in Tank Y. How much water was poured from Tank Y to Tank X?
3 m

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At first, Tank X and Tank Y contained 0.4 ℓ and 4.3 ℓ of water respectively. Some water from Tank Y was poured into Tank X with no water spilling over. In the end, there was as much water in Tank X as in Tank Y. How much water was poured from Tank Y to Tank X?