Problema Solution
A total of $11,000 was invested. Part of the $11,000 was invested at 4%, and the rest was invested at 7%. If the investments earn $680 per year, how much was invested at each rate?
Answer provided by our tutors
680 = x * 1 * 4/ 100 + (11000-x)*1*7/ 100
68000 = 4x -7x + 77000
3x = 9000
x = 3000
and 8000