Answer: 
<u>Simplify both sides of the equation</u>
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(Combine Like Terms)

<u>Subtract 1 from both sides</u>
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<u>Divide both sides by 2.2</u>
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Step-by-step explanation:
g = 28000 - 700t
because your started with 28000 gallons and every hour you have 700 less.