SOLUTION: 9 gal of sugar solution was mixed with 6 gal of a 90% sugar solution to make 84% sugar solutuin. Find a percent concentration of the first solution.

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Question 251728: 9 gal of sugar solution was mixed with 6 gal of a 90% sugar solution to make 84%
sugar solutuin. Find a percent concentration of the first solution.
Found 2 solutions by edjones, HydroKid:
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
9 * x=9x
6*.9=5.4
.
9x+5.4=15*.84
9x+5.4=12.6
9x=7.2
x=.8=80% concentration of the 1st solution.
.
Ed

Answer by HydroKid(4) About Me  (Show Source):
You can put this solution on YOUR website!
9 gal. of a sugar solution was mixed with 6 gallon of a 90% sugar solution to make a 84% sugar solution. Find the percent concentration of the first solution.
Ans:
Let x= percentage of sugar concentration in 9 gallons
(9*x)+(6*.9)=15*.84
Simplfy:
9x+5.4=12.6
Solve:
9x=12.6-5.4
9x=7.2
x=7.2/9
x=.8
Converted in to percent, .8 is equal to 80%, so our answer is that there is 80% of sugar concentration in a 9 gallon sugar solution.