Answer:
Explanation:
5 gallons to 20 qts = x gallons to 18 qts
5 x
------ = ------ cross multiply
20 18
(20)(x) = (5)(18)
20x = 90
x = 90/20
x = 4.5 <==== 18 qts is equal to 4.5 gallons
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20 qts to 5 gallons = 20/5 = 4 qts per gallon <==