Algebra 2
posted by Jennifer .
a chemistry lab assistant wants to prepare 10 liters of 48% acid solution. in stock he has 80% and 40% acid solutions. how many liters of each in stock solution should he mix to prepare a 10liter mixture?

Algebra 2 
helper
L = no. of liters of 80% solution
.80L = value of 80% solution
10  L = no. of liters of 40% solution
.40(10  L) = value of 40% solution
.48(10) = value of mixture
.80L + .40(10  L) = .48(10)
Solve for L
L = no. of liters of 80% solution
10  L = no. of liters of 40% solution
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