Edmond invested 5000 part of it at 4% simple interest rate and part of it at 2% interest rate if the total income for one year was $144 how much was invested at each rate

Answer 1

.04x + .02(5000-x) = 144

.04x - 0.02x = 144 - .02(5000) = 144 - 100 = 44

.02x = 44

x = 44/.02 = $2200 at 4%

and $2800 at 2%

.04(2200) + .02(2800) = 88 + 56 = 144