At the end of 3 years, your savings will have grown to $483.
You will have earned in $83.17 in interest.
Start by multiplying the 9 out:
9(-6 + 8y) = -54 + 72y
Then, add the 7:
-54 + 72y + 7
Then simplify the whole thing:
-47 + 72y
1/4 of 3 is 0.75 its is also 3/4
Because you multiply 1/4 times 3 and get that
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