Question

how many years would it take to earn $225 on a $750 investment at 5% simple interest?

Answer 1

225=.05(750)y
6 years
y=6

Answer 2

nvm.

Answer 3

Problem:
how many years would it take to earn $225 on a $750 investment at 5% simple interest?

Here's another way to think of it: we'll earn 5% interest on $750 each year; in how many years will that amount to $225 earned?

We know that in one year, we would earn ($750)*(0.05), so we want to know how many years it'll take us to earn a total of $225.

So the equation is:
$225 = ($750) (0.05) (number of years)

So:
Number of Years = $225/($750*0.05)

Make sense?
I hope so!