document.write( "Question 550874: A change purse contains a total of 100 nickels and dimes. The total value of the coins is $7. How many coins of each type does the purse contain? Solve and write a system of equations to model the situation. \n" ); document.write( "
Algebra.Com's Answer #359226 by ankor@dixie-net.com(22740)\"\" \"About 
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A change purse contains a total of 100 nickels and dimes.
\n" ); document.write( "n + d = 100
\n" ); document.write( "n = (100-d)
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\n" ); document.write( " The total value of the coins is $7.
\n" ); document.write( ".05n + .10d = 7.00
\n" ); document.write( "replace n in with (100-d)
\n" ); document.write( ".05(100-d) + .10d = 7.00
\n" ); document.write( "5 - .05d + .10d = 7.00
\n" ); document.write( "-.05d + .10d = 7 - 5
\n" ); document.write( ".05d = 2
\n" ); document.write( "d = \"2%2F.05\"
\n" ); document.write( "d = 40 dimes
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\n" ); document.write( "I'll let you find the number of nickels. check the solutions in the $$ equation\r
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