[tex] \dfrac{5}{7} \text { gallons }= 20\dfrac{5}{7} \text { miles }[/tex]
To fine one gallon:
[tex]20 \dfrac{5}{7} \div \dfrac{5}{7} [/tex]
[tex] = \dfrac{145}{7} \times \dfrac{7}{5} [/tex]
[tex]= 29[/tex]
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Answer: 1 gallon can traveled 29 miles
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