document.write( "Question 371294: Can you explain the correct way to work this systems of linear equations word problem out? Thanks! \r
\n" ); document.write( "\n" ); document.write( "Problem: A bricklayer begins work at 7 a.m., laying 170 bricks per hour. Two hours later his apprentice joins him and lays 80 bricks per hour. At what time will they have laid 965 bricks?
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Algebra.Com's Answer #264509 by ewatrrr(24785)\"\" \"About 
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\n" ); document.write( "Hi,
\n" ); document.write( "Let x represent the hours bricklayer beginning work at 7 a.m works.
\n" ); document.write( "Then (x-2)represents the hours for the other bricklayer
\n" ); document.write( "170/hr*x +80/hr*(x-2) = 965
\n" ); document.write( "solving for x
\n" ); document.write( "170x + 80x - 160 = 965
\n" ); document.write( "250x = 1125
\n" ); document.write( "x = 4.5 hrs, time worked for bricklayer beginning work at 7 a.m.
\n" ); document.write( "11:30 am wil be the time the work is finished. \n" ); document.write( "
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