# SOLUTION: Mary makes three invetments. The investment that pays 12% is twice the amount o the account that pays 9%. The amount invested at 10% is \$500 more than the amount invested at 9%. If

Algebra ->  Algebra  -> Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: Mary makes three invetments. The investment that pays 12% is twice the amount o the account that pays 9%. The amount invested at 10% is \$500 more than the amount invested at 9%. If      Log On

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 Question 219147: Mary makes three invetments. The investment that pays 12% is twice the amount o the account that pays 9%. The amount invested at 10% is \$500 more than the amount invested at 9%. If the annual interest income is \$1555, how much money is invested at each rate?Answer by checkley77(12569)   (Show Source): You can put this solution on YOUR website!.12*2X+.09X+.10(X+500)=1,555 .24X+.09X+.10X+50=1,555 .43X=1,555-50 .43X=1,505 X=1,505/.43 X=3,500 AMOUNT INVESTED @ 9% 2*3,500=7,000 AMOUNT INVESTED @ 12% 3,500+500=4,000 AMOUNT INVESTED @ 10% PROOF: .12*7,000+.09*3,500+.10*4,000=1,555 840+315+400=1,555 1,555=1,555