document.write( "Question 519987: Walt made an extra $7000 last year from a part time job. He invested part of the money at 8%and the rest at 6%. He made a total of $500.00 in interest. How much was invested at 6%? \n" ); document.write( "

Algebra.Com's Answer #345890 by Maths68(1474) $\"\"$ $\"About$

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Money invested at 8% = x
\n" ); document.write( "Money invested at 6% = 7000-x
\n" ); document.write( "Total interest from both investements = 500\r
\n" ); document.write( "\n" ); document.write( "Money invested at 8% * Interest + Money invested at 6% * Interest = Total interest from both investements\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "x*8% + (7000-x)*6% = 500
\n" ); document.write( "x*0.08 + (7000-x)*0.06 = 500
\n" ); document.write( "0.08x + 420-0.06x = 500
\n" ); document.write( "0.02x=500-420
\n" ); document.write( "0.02x=80
\n" ); document.write( "x=80/0.02
\n" ); document.write( "x=4000\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Money invested at 8% = x = $4000
\n" ); document.write( "Money invested at 6% = 7000-x = 7000-4000= $3000\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Check
\n" ); document.write( "=====
\n" ); document.write( "4000 * 0.08 + 3000 * 0.06 = 500
\n" ); document.write( "320 + 180 = 500
\n" ); document.write( "500 = 500 \n" ); document.write( "

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