document.write( "Question 392227: David has 50 employees. Blue collar workers make $600 per week and white collar workers make $1000 per week. David's payroll is $42,000. David has how many white collar workers? \n" ); document.write( "

Algebra.Com's Answer #278459 by NancyLam(35) $\"\"$ $\"About$

You can put this solution on YOUR website!
I don't do add or subtrac both side it take to long and make confusing too, I do only one side it quick and easy, you can do both side if you want
\n" ); document.write( "Let x= blue , y= White
\n" ); document.write( "$600x+$1000y=$42000
\n" ); document.write( " x+y=50
\n" ); document.write( " y= 50-x
\n" ); document.write( "600x+1000(50-x)=42000 (subtitution y=50-x)
\n" ); document.write( "600x+50000-1000x =42000 (mutipy)
\n" ); document.write( " -400x =42000-50000 (simplify)
\n" ); document.write( " x =-8000/-400
\n" ); document.write( " x = 20
\n" ); document.write( "x+y+=50
\n" ); document.write( "20+y=50
\n" ); document.write( " y = 50-20
\n" ); document.write( " y = 30
\n" ); document.write( "Check: y=30, x=20
\n" ); document.write( "$600(20)+1000(30)=$12000+$30000=$42000 \n" ); document.write( "

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