document.write( "Question 107794: Someone invested $12,000.00 for her education. The person invests a portion in a bank certificate of deposit which earns 4% and the remainder in a savings bond that earns 7.5%. If the total interest earned after one year is $720.00, how much money was invested in the CD account? \n" ); document.write( "
Algebra.Com's Answer #78565 by checkley71(8403)\"\" \"About 
You can put this solution on YOUR website!
.04X+.075(12,000-X)=720
\n" ); document.write( ".04X+900-.075X=720
\n" ); document.write( "-.035X=720-900
\n" ); document.write( "-.035X=-180
\n" ); document.write( "X=-180/-.035
\n" ); document.write( "X=5,142.86 INVESTED @ 4%.
\n" ); document.write( "12,000-5,142.86=6,857.14
\n" ); document.write( "PROOF
\n" ); document.write( ".04*5,142.86+.075*6,857.14=720
\n" ); document.write( "205.71+514.29=720
\n" ); document.write( "720=720
\n" ); document.write( "
\n" );