SOLUTION: You have a solution containing 10% acid and a solution containing 20% acid. How much of the 20% solution must be added to 5 liters of the 10% solution to create a mixture that is 1

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Question 1168770: You have a solution containing 10% acid and a solution containing 20% acid. How much of the 20% solution must be added to 5 liters of the 10% solution to create a mixture that is 18% acid? (Note: 10% of 5L is 0.5L.)
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Try accounting for the pure acid.

0.1%2A5%2B0.2x=0.18%285%2Bx%29
0.5%2B0.2x=0.18x%2B0.18%2A5
0.02x=0.18%2A5-0.5
0.02x=0.4

highlight%28x=20%29