document.write( "Question 704864: Lisa worked fifteen hours last week. One job as a clerk that paid $5.25 per hour, while her second job as a piano instructor paid $12.00 per hour. If she earned a total of $119.25 between two jobs, how many hours did she work as a piano instructor? \n" ); document.write( "

Algebra.Com's Answer #434301 by nerdybill(7384) $\"\"$ $\"About$

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Lisa worked fifteen hours last week. One job as a clerk that paid $5.25 per hour, while her second job as a piano instructor paid $12.00 per hour. If she earned a total of $119.25 between two jobs, how many hours did she work as a piano instructor?
\n" ); document.write( "Let x = hours worked as a piano instructor
\n" ); document.write( "then
\n" ); document.write( "15-x = hours worked as a clerk
\n" ); document.write( ".
\n" ); document.write( "12x + 5.25(15-x) = 119.25
\n" ); document.write( "12x + 78.75-5.25x = 119.25
\n" ); document.write( "6.75x + 78.75 = 119.25
\n" ); document.write( "6.75x = 40.50
\n" ); document.write( "x = 6 hours \n" ); document.write( "

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