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)![]() ![]() ![]() You can put this solution on YOUR website! 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 \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |