document.write( "Question 141224: Mr. Graham invested some of his $18,000 in bonds and made a 5% profit and the rest in bonds that made a 12% profit. If the profit on the 12% bonds was $885 more than the profit on the 5% bonds, how much did Mr. Graham invest in the 5% bonds? \n" ); document.write( "
Algebra.Com's Answer #102903 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
Mr. Graham invested some of his $18,000 in bonds and made a 5% profit and the rest in bonds that made a 12% profit. If the profit on the 12% bonds was $885 more than the profit on the 5% bonds, how much did Mr. Graham invest in the 5% bonds?
\n" ); document.write( ":
\n" ); document.write( "Let x = amt invested at 5%
\n" ); document.write( ":
\n" ); document.write( "It said the total invested was 18000, therefore:
\n" ); document.write( "(18000-x) = amt invested at 12%
\n" ); document.write( ":
\n" ); document.write( "5% profit + 885 = 12% profit
\n" ); document.write( ".05x + 885 = .12(18000-x)
\n" ); document.write( ":
\n" ); document.write( ".05x + 885 = 2160 - .12x
\n" ); document.write( ":
\n" ); document.write( ".05x + .12x = 2160 - 885
\n" ); document.write( ":
\n" ); document.write( ".17x = 1275
\n" ); document.write( "x = \"1275%2F.17\"
\n" ); document.write( "x = $7500 invested at 5%
\n" ); document.write( ";
\n" ); document.write( ":
\n" ); document.write( "Check solution find the profit on each; 18000-7500 = 10500 invested at 12%
\n" ); document.write( ".12*10500 = 1260
\n" ); document.write( ".05*7500 = 375
\n" ); document.write( "----------------
\n" ); document.write( "difference = 885; confirms our solution \n" ); document.write( "
\n" );