|Hi Christine. No math class problem is worth that! :)
Think about it this way: That 6% is your earnings. So is the $1200. That
means they equal each other. So 6% of your investment is $1200. Written
as an equation, that is:
6% x I = $1200.
If you solve for I, you'll have your answer.
I hope this helps.
Stephen La Rocque>