document.write( "Question 139291: Sally works at a grocery store. In one week she earned $390 for working 47 hours of which 7 hours were overtime. The next week she earn $416 for working 50 hours of which 8 hours were obertime. What is Sally's hourly overtime rate in dollars per hour?\r
\n" ); document.write( "\n" ); document.write( "I have worked on this for 3 days now and can't get answer that works it would be great if someone could help.
\n" ); document.write( "

Algebra.Com's Answer #101560 by scott8148(6628)\"\" \"About 
You can put this solution on YOUR website!
3 days is long enough...\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "let x=\"overtime rate\" and let y=\"regular rate\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"she earned $390 for working 47 hours of which 7 hours were overtime\" __ 7x+40y=390
\n" ); document.write( "__ subtracting 7x __ 40y=390-7x __ dividing by 40 __ y=(390-7x)/40\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"she earn $416 for working 50 hours of which 8 hours were obertime\" __ 8x+42y=416\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "substituting __ 8x+42[(390-7x)/40]=416 __ multiplying by 40 __ 320x+16380-294x=16640\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "subtracting 16380 __ 26x=260 __ dividing by 26 __ x=10
\n" ); document.write( "
\n" );