We know that
• The principal is $16,000.
,
• The simple interest rates are 8% and 9%.
,
• The interest obtained is $1,379.
,
• The time is 1 year.
We can express the following

We know that the total interest for one year is $1,379, so

Let's solve the first equation for x

Then, we combine the equations

Now, we find x

Hence, the 8% account has an investment of $6,100 and $9,900 for the 9% account.