document.write( "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? \n" ); document.write( "
Algebra.Com's Answer #14313 by stanbon(75887) ![]() You can put this solution on YOUR website! Let amount invested at 5% be \"x\". \n" ); document.write( "The amount invested at 7% is \"x+500\" \n" ); document.write( "EQUATION: \n" ); document.write( "Interest + Interest= $515 \n" ); document.write( "0.05x + 0.07(x+500)=515 \n" ); document.write( "Multiply through be 100 to get: \n" ); document.write( "5x+7x+3500=51500 \n" ); document.write( "12x=48000 \n" ); document.write( "x=4000 (amount invested at 5% \n" ); document.write( "x+500=4500 (amount invested at 7%) \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |