document.write( "Question 222582: you have $12000 to invest.if part is invested at 10% and rest at 15%,how should be invested ateach rate to yeild 12% on total amount? \n" ); document.write( "
Algebra.Com's Answer #166640 by checkley77(12844)\"\" \"About 
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.15x+.10(12,000-x)=.12*12,000
\n" ); document.write( ".15x+1,200-.10x=1440
\n" ); document.write( ".05x=1440-1200
\n" ); document.write( ".05x=240
\n" ); document.write( "x=240/.05
\n" ); document.write( "x=4,800 invested @ 15%.
\n" ); document.write( "12,000-4,800=7,200 invested @ 10%.Proof:
\n" ); document.write( ".15*4,800+.10*7,200=.12*12,000
\n" ); document.write( "720+720=1,440
\n" ); document.write( "1,440=1,440
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