SOLUTION: Last year, Lena had $10,000 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 5% simple

Question 727081:
Last year, Lena had $10,000 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 5% simple interest per year. After one year, she received a total of $770 in interest. How much did she invest in each account?
Answer by checkley79(3341) (Show Source): You can put this solution on YOUR website!
.08X+.05(10,000-X)=770
.08X+500-.05X=770
.03X=770-500
.03X=270
X=270/.03
X=9,000 AMOUNT INVESTED @ 8%.
10,000-9,000=1,000 AMOUNT INVESTED @ 5%.
PROOF:
.08*9,000+.05*10,000=770
720+50=770
770=770
RELATED QUESTIONS
Last year, Ivanna had $10,000 to invest. She invested some of it in an account that paid... (answered by josgarithmetic)

Last year, Kareem had $10,000 to invest. He invested some of it in an account that paid... (answered by ikleyn)

Last year, Lucy had $10,000 to invest. He invested some of it in an account that paid 9%... (answered by ikleyn)

Last year, Ann had $20,000 to invest. She invesed some of it in an account that paid 8%... (answered by addingup)

Last year, Dan had $10,000 to invest. He invested some of it in an account that paid 5%... (answered by josgarithmetic,greenestamps)

Last year, Elsa had $30,000 to invest. She invested some of it in an account that paid 6% (answered by ikleyn,greenestamps)

Last year, Latoya had $30,000 to invest. She invested some of it in an account that paid (answered by Boreal)

Last year, Carlos had $30,000 to invest. He invested some of it in account that paid 10%... (answered by greenestamps)

Last year Carlos had $30000 to invest he invested some of it in an account that paid 10%... (answered by stanbon)