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Math·Algebra·Linear equations in two variables

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Micah deposited a total of $3,600 into two retirement accounts last year by depositing $x$ dollars once each month into one account and $y$ dollars twice each month into the other account. Which equation represents this situation?

A

$3,600=12x+12y$

B

$3,600=12x+24y$

C

$3,600=24x+12y$

D

$3,600=24x+24y$