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 #14312 by wuwei96815(245)\"\" \"About 
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:
\n" ); document.write( "5%x + 7%(x+500) = $515.\r
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\n" ); document.write( "\n" ); document.write( "5%x + 7%(x+500) = $515
\n" ); document.write( "0.05x + 0.07x + 35 = 515
\n" ); document.write( "0.12x = 515 - 35 = 480
\n" ); document.write( "x = 480/0.12 = 4000\r
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\n" ); document.write( "\n" ); document.write( "x = $4000
\n" ); document.write( "x+500 = $4500
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