document.write( "Question 97820: erick's bank contains 66 quarters and dimes, of which Q are quarters. Find the total value of coins in dollars. He has $13.80\r
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Algebra.Com's Answer #71164 by checkley71(8403)\"\" \"About 
You can put this solution on YOUR website!
Q+D=66 OR Q=66-D
\n" ); document.write( "25Q+10D=1380 NOW REPLACE (66-D) FOR Q & SOLVE FOR D.
\n" ); document.write( "25(66-D)+10D=1380
\n" ); document.write( "1650-25D+10D=1380
\n" ); document.write( "-15D=1380-1650
\n" ); document.write( "-15D=270
\n" ); document.write( "D=-270/-15
\n" ); document.write( "D=18 ANSWER FOR THE NUMBER OF DIMES.
\n" ); document.write( "Q=66-18=48 ANSWER FOR THE NUMBER OF QUARTERS.
\n" ); document.write( "PROOF
\n" ); document.write( "25*48+10*18=1380
\n" ); document.write( "1200+180=1380
\n" ); document.write( "1380=1380
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