Question

Last year, Raina had $10,000 to invest. She invested some of it in an account that paid 9% simple interest per year, and she invested the rest in an account that paid 8% simple interest per year. After one year, she received a total of $870 in interest. How much did she invest in each account?​

Answer 1

Answer:

7000 in the account that paid 9% interest rate and 3000 in the account that paid 8% interest rate

Step-by-step explanation:

Let $x be invested in account 1 and $(10000-x) in the second account

Then, 870=x*9/100+(10000-x)*8/100

x=$7,000.