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)\"\" \"About 
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
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