Alex invested money in two accounts, and after one year, one of them

had earned 13% interest and the other 9%. He had $700 more invested

in the lower interest account and earned a total of 239 in interest after

one year. How much did Alex invest in each account? answer is 800 at 13% and invested 1500 at 9%

1 answer

.13x + .09(x+700) = 239
x = 800

as above.