# SOLUTION: i need help in solving with a coin and intrest problem> it goes like this an invester has 500\$ more invested at 7% than he does at 5%. if his annual interest is \$515, how much does

Algebra ->  Algebra  -> Equations -> SOLUTION: i need help in solving with a coin and intrest problem> it goes like this an invester has 500\$ more invested at 7% than he does at 5%. if his annual interest is \$515, how much does      Log On

 Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations! Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

 Algebra: Equations Solvers Lessons Answers archive Quiz In Depth

 Question 26422: i need help in solving with a coin and intrest problem> it goes like this an invester has 500\$ more invested at 7% than he does at 5%. if his annual interest is \$515, how much does he have invested at each rate? Found 2 solutions by wuwei96815, stanbon:Answer by wuwei96815(245)   (Show Source): You can put this solution on YOUR website!If we let x = amount invested at 5% and x+500 = the amount invested at 7%, we can write and solve the following equation: 5%x + 7%(x+500) = \$515. 5%x + 7%(x+500) = \$515 0.05x + 0.07x + 35 = 515 0.12x = 515 - 35 = 480 x = 480/0.12 = 4000 x = \$4000 x+500 = \$4500 Answer by stanbon(57967)   (Show Source): You can put this solution on YOUR website!Let amount invested at 5% be "x". The amount invested at 7% is "x+500" EQUATION: Interest + Interest= \$515 0.05x + 0.07(x+500)=515 Multiply through be 100 to get: 5x+7x+3500=51500 12x=48000 x=4000 (amount invested at 5% x+500=4500 (amount invested at 7%) Cheers, Stan H.