<PRE><B>Question 1105138</B>
She built x m a day.
In 24/x days, she built 24 m.
(x-2) m per day, this would take 24/(x-2) days to complete, and 24/(x-2) )minus 2=(24/x)
Multiply both sides by x(x-2) to clear fractions
24x-2x^2+4x=24x-48
24 x cancel
0=2x^2-4xx-48=x^2-2x-24
0=(x-6)(x+2)
x=6 meters a day, positive root only.  ANSWER.
It took 4 days to build 24 m. and at 4 meters a day, 2 meters less per day, it would take 6 days, 2 days longer.
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