$\"\"$

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Dena stopped for gasoline twice during the road trip.

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The total price of gasoline spent by Dena is $\"\"$ .

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Amount of gasoline is $\"\"$ .

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Let $\"\"$ be the amount of gasoline at station $\"\"$ .

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Let $\"\"$ be the amount of gasoline at station $\"\"$ .

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The total price of gasoline spent by Dena : $\"\"$ .

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Amount of gasoline : $\"\"$ .

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The system of equations are $\"\"$ and $\"\"$ .

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Coefficient matrix is $\"\"$ .

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Caluculate the determinant of matrix $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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Cramer $\"\"$ s rule : Solutions of the system of equations $\"\"$ , $\"\"$ and $\"\"$ for $\"\"$ .

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Find number of gallons of gasoline at station $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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Number of gallons of gasoline at station $\"\"$ is $\"\"$ gallons.

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$\"\"$

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Number of gallons of gasoline at station $\"\"$ is $\"\"$ gallons.