Six bottles of 2 liters of water cost $12. What is the price of 1 liter of water?
How much does each bottle of 2 liters of water cost? ** Each bottle of 2 liters of water costs $12/6 = $<<12/6=2>>2.
How much does 1 liter of water cost? ** So the cost of 1 liter of water is $2/2 = $<<2/2=1>>1.
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