Question

hakiim invested 15000 he put part of it in a term deposit that paid 4% per annum and the remainder in a treasury bill that paing 5% per annum after one year the total interest was 690 how much did hakiim invest at each rate

Answer 1

if there is $x at 4%, then the rest (15000-x) is at 5%.

Now just add up the interest and solve for x:

.04x + .05(15000-x) = 690