James paints a fence. If every day instead of 14 planks painted 16 would be done on one day earlier. How many of planks has a fence altogether?

Correct result:

n =  112


14 t = n
16 ( t-1) = n

14•t = n
16•( t-1) = n

n-14t = 0
n-16t = -16

n = 112
t = 8

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