Question 899353
let interest rate on $1000 be x

15000 @ (x+4)%

interest earned on 15000 less interest earned on 1000 = 410

15000*(x+4)% -1000*x%=410

multiply by 100

15000(x+4)-1000x= 41000

15000x+60000-1000x=41000

there appears to be a typo in the problem