Question 605946
1/x + 1/(x-1) = 1/t


t(x-1) + tx = x(x-1)


t(x-1+x) = x(x-1)


t(2x-1) = x(x-1)


t = (x(x-1))/(2x-1)


So working together, you both can type out a page in (x(x-1))/(2x-1) minutes.


So 100 pages will take (100x(x-1))/(2x-1) minutes


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