document.write( "Question 341835: Walt made an extra $9000.00 last year from a part time job. He invested part of the money at 8% and the rest at 7%. He made a total of $680.00 in nterest. How much was invested? \n" ); document.write( "
Algebra.Com's Answer #244767 by mananth(16946)![]() ![]() You can put this solution on YOUR website! let him invest $x at 8% \n" ); document.write( "he will invest 9000-x at 7% \n" ); document.write( "he recieved an interest of $680 \n" ); document.write( ".. \n" ); document.write( "0.08x+0.07(9000-x)=680 \n" ); document.write( "multiply by 100 \n" ); document.write( "8x+7(9000-x)=100*680 \n" ); document.write( "8x+63000-7x= 68000 \n" ); document.write( "x= 68000-63000 \n" ); document.write( "x= 5000 amount invested @ 8% \n" ); document.write( "balance $4000 he invests at 7% \n" ); document.write( " \n" ); document.write( " |