From 200 g of a 10% salt solution, it is necessary to prepare an 8% solution. To do this, add __g of water

This solution contains:
200 * 0.1 = 20 g of salt and, accordingly, 180 g of water, we compose the proportion:
20 g – 8%
x g – 100%
x = 20 * 100/8 = 250 – so we need to add 50 g of water

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