document.write( "Question 589568: Please help me figure out the problem below. \r
\n" );
document.write( "\n" );
document.write( "Mark invests $8000 in an account that pays 12% interest and $2000 in one that pays 8%. If he leaves the money in the accounts for the same length of time, how long must he leave it to gain $5600 in interest?\r
\n" );
document.write( "\n" );
document.write( "So far I have: P= 8000 R=.12 T=X I= 960X
\n" );
document.write( " * *
\n" );
document.write( " P= 2000 R= .08 T=Y I= 160Y\r
\n" );
document.write( "\n" );
document.write( "HELP ME PLEASE! \n" );
document.write( "
Algebra.Com's Answer #374913 by mananth(16946)![]() ![]() You can put this solution on YOUR website! Interest on I + Interest on II = 5600\r \n" ); document.write( "\n" ); document.write( "I continue where you left\r \n" ); document.write( "\n" ); document.write( "960x+160y=5600\r \n" ); document.write( "\n" ); document.write( "but x=y\r \n" ); document.write( "\n" ); document.write( "960x+160x=5600\r \n" ); document.write( "\n" ); document.write( "1120x=5600 \n" ); document.write( "/1120 \n" ); document.write( "x= 5\r \n" ); document.write( "\n" ); document.write( "5 years \n" ); document.write( " \n" ); document.write( " |