I need help atleast an equation to get started please

A lab assisstant wants to make five liters of 27.8% acid solution. If solutions of 50% and 13% are in stock, how many liters of each must be mixed to prepare the solution.

3 answers

.5x + .13(5-x) = .278*5
x=2

so, use 2L of 50% and 3L of 13%

8o7o8o

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