Mathematics, 23.10.2019 22:30, cairolove228

How many liters of a 35% acid solution and a 85% acid solution must be used to produce 80 liters of a 40% acid solution? i already know the answer but i don't understand the steps to find it such as getting the equations.

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How many liters of a 35% acid solution and a 85% acid solution must be used to produce 80 liters of...