James

James paints a fence. If he painted every day, instead of 14 planks, he would do 16 one day earlier. How many planks have a fence altogether?

Correct answer:

n =  112

Step-by-step explanation:


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

14·t = n
16·( t-1) = n

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

Row 2 - Row 1 → Row 2
n-14t = 0
-2t = -16


t = -16/-2 = 8
n = 0+14t = 0+14 · 8 = 112

n = 112
t = 8

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