SOLUTION: Translate the problem into a pair of linear equations in two variables. Solve the equations using either elimination or substitution. State your answer for the specified variable.

Question 279402: Translate the problem into a pair of linear equations in two variables. Solve the equations using either elimination or substitution. State your answer for the specified variable.
In a chemistry class, 5 liters of a 4%-saline solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
.04*5+.10*x=.06*(5+x)
or with two variables
5+x=y
.04*5+.10*x=.06*y
which is a waste of time
x=2.5
y=7.5
5+x=7.5

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