document.write( "Question 44768: A jar full of nickels and dimes contains 180 coins . If the total amount of money contained in the jar is $13.000, how many nickels are in the jar?\r
\n" ); document.write( "\n" ); document.write( "I set up the equation,
\n" ); document.write( "$0.05x + 0.10y = $13.00
\n" ); document.write( "and x + y = 180
\n" ); document.write( "x=nickels and y=dimes\r
\n" ); document.write( "\n" ); document.write( "i really don't remember how to solve it now, since it has two variables...please if someone could help me, i would really appreciate it [please by today?] thanks \n" ); document.write( "

Algebra.Com's Answer #29628 by OHtutor(16) $\"\"$ $\"About$

You can put this solution on YOUR website!
Your equations are set up correctly.
\n" ); document.write( "x+y=180
\n" ); document.write( ".05x+.10y=13
\n" ); document.write( "I rewrite the 2nd quation like this (multiplying by 100)
\n" ); document.write( "5x+10Y=1300
\n" ); document.write( "-----------
\n" ); document.write( "x=180-y
\n" ); document.write( "5(180-y) +10y=1300
\n" ); document.write( "930-5y+10y=1300
\n" ); document.write( "5y=1300-930
\n" ); document.write( "5y=370 y=370/5=54
\n" ); document.write( "x=180-54=126\r
\n" ); document.write( "\n" ); document.write( "x=126(nickels)
\n" ); document.write( "y=54(dimes)\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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