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30 votes
30 votes
A 15- gallon gasoline tank is7/10 full. How many gallons will it take to fill the tank?Pls help!!

User Jorge Vargas
by
3.5k points

1 Answer

18 votes
18 votes

Let:

x = gasoline tank capacity

a = gasoline in the tank

b = gallons needed to fill the tank

so:


\begin{gathered} x=15gal \\ a=15\cdot(7)/(10)=10.5 \end{gathered}

Hence:


b=15-10.5=4.5gal

User Asty
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2.9k points