document.write( "Question 160305: Dr. Beaker invested $3000, part at 8% and the rest at 7 1/2%. The total return for one year was $231. How much was invested at each rate? \n" ); document.write( "

Algebra.Com's Answer #118249 by jojo14344(1513) $\"\"$ $\"About$

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\n" ); document.write( "Let's supposed \"x\" is invested @ 8% and the rest ---> \"$3000-x\" is invested @ 7.5% that has a return of $231 in 1 year. Putting into eqn:
\n" ); document.write( " $\"0.08x%2B0.075%283000-x%29=231\"$ , WORKING EQN
\n" ); document.write( " $\"0.08x%2B225=0.075x=231\"$
\n" ); document.write( " $\"0.005x=231-225=6\"$
\n" ); document.write( " $\"cross%280.005%29x%2Fcross%280.005%29=cross%286%291200%2Fcross%280.005%29\"$
\n" ); document.write( " $\"x=1200\"$ , amount invested at 8%.
\n" ); document.write( " $\"3000-1200=1800\"$ amount invested at 7.5%
\n" ); document.write( "Let's check, go back WORKING EQN:
\n" ); document.write( " $\"0.08%281200%29%2B0.075%281800%29=231\"$
\n" ); document.write( " $\"96%2B135=231\"$
\n" ); document.write( " $\"231=231\"$
\n" ); document.write( "Thank you,
\n" ); document.write( "Jojo \n" ); document.write( "

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