Question

An investment that yielded 6% simple interest came due at the end of the year. Dominica received a check for the total amount (interest plus principle) of $169.60. What was his original investment?

Answer 1

Since the interest is 6% per year, and this is at the end of one year, the check was for 106% of the original investment.
106%x = 169.60
Solve for x