a woman invested a total of 30,000 in two accounts one of the accounts pays 6% and the other pays 9% simple interest annually of she earned 2100 in interest how much did she invest in each amount?

Answer 1

2100/30000 = 21/300 = 7/100 = 7% average return on the two investments at 6% and 9%

9-7 = 2, 7-6 = 1

2/1 = 2 means twice as much invested at 6% as at 9%

$20,000 invested at 6%

$10,000 invested at 9%