document.write( "Question 148933: Walt made an extra $9000 last year from a part-time job. he invested part of the money at 9% and the rest at 8%. he made a total of $770 in interest. How much was invested at 8%? \n" ); document.write( "
Algebra.Com's Answer #109263 by checkley77(12844)\"\" \"About 
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.09X+.08(9000-X)=770
\n" ); document.write( ".09X+720-.08X=770
\n" ); document.write( ".01X=770-720
\n" ); document.write( ".01X=50
\n" ); document.write( "X=50/.01
\n" ); document.write( "X=5,000 INVESTED @ 9%
\n" ); document.write( "9,000-5,000=4,000 INVESTED @ 8%.
\n" ); document.write( "PROOF:
\n" ); document.write( ".09*5000+.08*4000=770
\n" ); document.write( "450+320=770
\n" ); document.write( "770=770
\n" ); document.write( "
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