Question 1166268
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Let *[tex \Large x] represent the number of days it takes Noel working by himself.  Then *[tex \Large x\ -\ 4] is the number of days it takes Noel by himself.


In one day, Noel can accomplish *[tex \Large \frac{1}{x}] of the work.  In one day, Michael can accomplish *[tex \Large \frac{1}{x\ -\ 4}].  In one day, working together they can accomplish *[tex \Large \frac{1}{7}] of the work.  Add the two fractions expressed in terms of *[tex \Large x] and set the sum equal to *[tex \Large \frac{1}{7}].


Solve for *[tex \Large x]

																
John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
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