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The amount of water used to take a shower is directly proportional to the amount of time. A shower lasting 18 minutes requires qw gallons of water. Find the amount of water in a shower lasting 6 minutes

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VenusRetrograde
18 minutes=gw gallons

  18minutes        6 minutes
__________ = __________
 gw gallons          x gallons

cross multiply
18x=6gw
divide both sides by 18
x=6/18 gw
simplify
x=1/3 gw

Answer= 1/3 gw
1/3 gw gallons of water is in the shower lasting 6 minutes

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