Dylan got his math test back and saw a -12 1/2 points on the top of his math test. The grade was 100% because he earned extra cr
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First recognize that the unit rate we're finding is gallons per hour, or 
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rate for Tank 1 = x gallons per hour = <em>a</em> gallons / <em>b</em> hours
rate for Tank 2 = y gallons per hour = <em>c</em> gallons / <em>d</em> hours
rate for Tank 1 = x gallons per hour = <em>a</em> gallons / <em>b</em> hours
rate for Tank 2 = y gallons per hour = <em>c</em> gallons / <em>d</em> hours