SOLUTION: How much water be added to 30 litres of alcohol to make solution of 40% strength

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Question 962270: How much water be added to 30 litres of alcohol to make solution of 40% strength
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Write the concentration equation. Water is 0%.
0%2AX%2B100%2A30=40%28X%2B30%29
3000=40X%2B1200
40X=1800
X=1800%2F40
X=45liters