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Simon opened a certificate of deposit with the money from his bonus check. the bank offered 4.5% interest for three years of deposit. Simon calculated that he would earn $87.75 interest in that time. How much did Simon deposit to open the accou?

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Kirstinjohnson6idn
Let's say the deposit number is z.
$87.75 is 4.5% of 3z.
"of" is multiplication.
So, it would read $87.75 is 4.5% x 3z.
Change the percentage to a decimal (without it being a percentage).
It would then read $87.75 is 0.045 x 3z.
The opposite of multiplication is division, so instead of multiplying 0.045 by 3z, you would divide $87.75 by 0.045 to equal 3z.
This would equal 1,950 = 3z.
Now, just like in an algebraic equation, you would divide both sides by 3.
1,950/3 = 3z/3
650 = z
$650 is the deposit amount.
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