SOLUTION: Mari mixes 16 liters of 18% solution with 27% acid solution to make 21% acid solution. Let x represent the number of liters of 27% solution used. Which equation can be used to find

Question 809240: Mari mixes 16 liters of 18% solution with 27% acid solution to make 21% acid solution. Let x represent the number of liters of 27% solution used. Which equation can be used to find the number of liters of 27% acid solution in the mixture solution?
A) 2.88+.21x=.27(x+16)
B) 2.88+.27x=.21(x+16)
C) 4.32+.21x=.27(x+16)
D) 3.36+.27x=.18(x+16)
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
(amount of pure acid)/(amount of solution or mixture resulting)=(concentration of acid in solution or mixture)

Let x = amount of the 27 % acid to use.

, or according to the way the choices are presented,

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