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Joe spent $35.40 to fill 15 gallons of gas in his minivan. How much would 6 gallons of gas cost?

Joe spent $35.40 to fill 15 gallons of gas in his minivan. How much would 6 gallons of gas cost?
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Joe spent $35.40 to fill 15 gallons of gas in his minivan. How much would 6 gallons of gas cost?

User FabienP
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\begin{array}{ccll} \$&gallons\\ \cline{1-2} 35.40 & 15\\ x& 6 \end{array} \implies \cfrac{35.40}{x}~~=~~\cfrac{15}{6} \\\\\\ \cfrac{35.4}{x}=\cfrac{5}{2}\implies 70.8=5x\implies \cfrac{70.8}{5}=x\implies 14.16=x

User JJohnson
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It would 14.16 for 6 gallons
User Dabuki
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