document.write( "Question 69930: A collection of quarters and nickels is worth $3.70. There are 22 coins in all. How many of each are there? \n" ); document.write( "
Algebra.Com's Answer #49808 by checkley75(3666)\"\" \"About 
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Q+N=22
\n" ); document.write( "Q=22-N
\n" ); document.write( "25Q+5N=370 NOW SUBSTITUTE (22-N) FOR N IN THE SECOND EQUATION THUS:
\n" ); document.write( "25(22-N)+5N=370
\n" ); document.write( "550-25N+5N=370
\n" ); document.write( "-20N=370-550
\n" ); document.write( "-20N=-180
\n" ); document.write( "N=-180/-20
\n" ); document.write( "N=9 NUMBER OF NICKELS
\n" ); document.write( "Q+9=22
\n" ); document.write( "Q=22-9
\n" ); document.write( "Q=13 NUMBER OF QUARTERS
\n" ); document.write( "PROOF
\n" ); document.write( "25*13+5*9=370
\n" ); document.write( "325+45=370
\n" ); document.write( "370=370\r
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