Question 420013
Since 4 quarts = 1 gallon, we can multiply both sides by {{{x^2+3x}}} to get


{{{4(x^2+3x)}}} quarts = {{{1(x^2+3x)}}} gallons



{{{4x^2+12x}}} quarts = {{{x^2+3x}}} gallons



So you are correct. Good job.




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