Problema Solution
walt made an extra $10,000 last year from a part - time job. he invested part of the money at 7% and the rest at 10% he made a total of $790 in interest. how much did he invest at each rate?
Answer provided by our tutors
let
x = the money he invested at 7%
y = the money he invested at 10%
walt made an extra $10,000 last year from a part - time job. he invested part of the money at 7% and the rest at 10% he made a total of $790 in interest:
x + y = 10000
0.07x + 0.10y = 790
by solving the above system of equation we find:
x = $7,000
y = $3,000
click here to see the step by step solution of the system of equations:
Walt invested $7,000 at 7% and $3,000 at 10%.