Question 299225
let the amount invested at 3% be x

the amount invested at 8% will be 8000-x

0.03x+0.08(8000-x)=490

0.03x + 640 - 0.08x=490

-0.05x= -150

x= -150 / -0.05

x=3000  which is amount invested at 3%

Balance $5000 at *%