Question 456844
Here is what we know:
1) The total interest is $1,080. We also know part was invested at 6% and the other at percent. This results in the first of two equations. .06x+.08y=$1,080.

2) We also know that together he invested $16,000. This is the second equation.
x+y=$16,000

This sets up the equations to solve in a system of equations computation problem. .06x+.08y=$1,080 and x+y=$16,000.

This should help quite a bit.