SOLUTION: how many cubic centimeters of 30% solution should be mixed with 80% solution to get 50 cubic centimeter of 60% solution?

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Question 340409: how many cubic centimeters of 30% solution should be mixed with 80% solution to get 50 cubic centimeter of 60% solution?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let A be the amount of 30% solution, B the amount of 80% solution.
1.A%2BB=50
.
.
.
30A%2B80B=60%2850%29
30A%2B80B=3000
2.3A%2B8B=300
Multiply eq. 1 by (3) and subtract it from eq. 2,
3A%2B8B-3A-3B=300-150
5B=150
highlight%28B=30%29cc
Then from eq. 1,
A%2B30=50
highlight%28A=20%29cc