document.write( "Question 852689: A plumber charges R240 per hour for a labour plus a call out fee of R60. When he. Repaired Mrs Mofokeng's leaking tap he charged her R540. How long did the plumber take to make the repair? \n" ); document.write( "
Algebra.Com's Answer #513614 by Theo(13342)\"\" \"About 
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240 per hour plus a flat fee of 60.
\n" ); document.write( "total cost was 540.
\n" ); document.write( "equation for total cost is:
\n" ); document.write( "c = 60 + 240h
\n" ); document.write( "c is the total cost.
\n" ); document.write( "h is the number of hours.
\n" ); document.write( "you have c = 540 so the equation becomes:
\n" ); document.write( "540 = 60 + 240h
\n" ); document.write( "subtract 60 from both sides of the equation to get:
\n" ); document.write( "540 - 60 = 240h
\n" ); document.write( "simplify to get:
\n" ); document.write( "480 = 240h
\n" ); document.write( "divide both sides of the equation by 240 to get:
\n" ); document.write( "480 / 240 = h
\n" ); document.write( "simplify to get:
\n" ); document.write( "h = 2
\n" ); document.write( "he worked for 2 hours.
\n" ); document.write( "60 + 2 * 240 = 60 + 480 = 540
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