Problema Solution
Walt made an extra $10000 at a part time job last year. He invested part of it at 8% and the rest at 9%. He made a total of $830.00 in interest. How much was invested at 9%.
Answer provided by our tutors
let
x = the money invested at 9%
10,000 - x = the rest of the money was invested at 8%
He made a total of $830.00 in interest:
0.08(10000 - x) + 0.09x = 830.00
by solving we find:
x = $3,000
click here to see the step by step solution of the equation:
Walt invested $3,000 at 9%.