a total of $5000 is invested at 2%, 3%, and 4%. the amount invested at 4% is equal to 2% and 3% combined together. the total interest gained for 1 year is $145. find the amount invested at each rate.

Answer 1

If the amounts invested are x,y,z then we have

x+y+z = 5000
x+y = z
.02x + .03y + .04z = 145

Hmmm. I get -500 for y. Sure there's no typo in the problem?

Answer 2

no sir im pretty sure i typed it correctly from what my professor gave me. i also got -500 but it seems wrong so i went here. thank you so much for taking time and answering my question :)