Question

Last year, Susan had 30,000 to invest. She invested some of it in an account that paid 8% simple interest per year, and she invested the rest in an account that paid 7% simple interest per year. After one year, she received a total of $2150 in interest. How much did she invest in each account?

Answer 1

.08 x + .07(30000-x) = 2150

.08 x + 2100 -.07 x = 2150

.01 x = 50

x = 5,000
30,000 - x = 25,000