SOLUTION: How many quarts of a 30% salt solution must be added to 12 quarts of a 65% salt solution in order to produce a solution that is 55% salt?

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Question 438306: How many quarts of a 30% salt solution must be added to 12 quarts of a 65% salt solution in order to produce a solution that is 55% salt?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
.3m+12(.65)=.55(m+12)
.3m+7.8=.55m+6.6
.25m=1.2
m=1.2/.25=4.8 qts. of 30% salt solution necessary..