(N+5)x=20

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Solution for (N+5)x=20 equation: 



(+5)N=20

We move all terms to the left:

(+5)N-(20)=0

We add all the numbers together, and all the variables

5N-20=0

We move all terms containing N to the left, all other terms to the right

5N=20

N=20/5

N=4

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