document.write( "Question 899891: 1. A woman is paid $20 for each day she works and forfeits $4 for each day she is idle. At the end of 25 days she nets $450. How many days did she work? \n" ); document.write( "
Algebra.Com's Answer #545644 by richwmiller(17219)\"\" \"About 
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w+i=25,
\n" ); document.write( "20w-4*i=450
\n" ); document.write( "It doesn't come out whole numbers
\n" ); document.write( "about 23 working 2 idle\r
\n" ); document.write( "\n" ); document.write( "x+y=25,
\n" ); document.write( "20*x-4*y=450
\n" ); document.write( "x=25-y
\n" ); document.write( "20*(25-y)-4*y=450
\n" ); document.write( "500-20y-4*y=450
\n" ); document.write( "-24*y=-50
\n" ); document.write( "y=2.08333333
\n" ); document.write( "x=25-y
\n" ); document.write( "x=22.9166667 y=2.08333333
\n" ); document.write( "check
\n" ); document.write( "22.9166667+2.08333333=25
\n" ); document.write( "20*x-4*y=450
\n" ); document.write( "20*22.9166667-4*2.08333333=450
\n" ); document.write( "458.333333-8.33333333=450
\n" ); document.write( "450.0=450
\n" ); document.write( "ok\r
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