SOLUTION: Last year, Ivanna had $10,000 to invest. She invested some of it in an account that paid 6% simple interest per year, and she invested the rest in an account that paid 9% simple in

Question 1166104: Last year, Ivanna had $10,000 to invest. She invested some of it in an account that paid 6% simple interest per year, and she invested the rest in an account that paid 9% simple interest per year. After one year, she received a total of $660 in interest. How much did she invest in each account?
First account?
Second account?

Answer by josgarithmetic(39616) (Show Source): You can put this solution on YOUR website!
Let x be invested at the 9% rate.
10000-x is invested at the 6% rate.

Simplify and solve this for x.
.
.
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