document.write( "Question 705584: A florist is paid $12 per hour and her helper is paid $8 per hour. Together they worked 30 hours on a job and made a total of $320. How many hours did the florist work? \n" ); document.write( "
Algebra.Com's Answer #434680 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
This is like a mixture problem. Let x amount hours of the helper and y the hours of the florist.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "8*x+12*y=320 accounting for dollars.
\n" ); document.write( "x+y=30 account for hours.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Divide the dollars equation by 4.
\n" ); document.write( "2*x+3*y=80\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "The system is as simple as
\n" ); document.write( "2*x+3*y=80
\n" ); document.write( "x+y=30\r
\n" ); document.write( "\n" ); document.write( "Subtract 2 times the second equation from the first equation:
\n" ); document.write( "0*x+1*y=20
\n" ); document.write( "y=20 hours for the florist.
\n" ); document.write( "
\n" );