N-8=21-4

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Solution for N-8=21-4 equation: 


Simplifying
N + -8 = 21 + -4

Reorder the terms:
-8 + N = 21 + -4

Combine like terms: 21 + -4 = 17
-8 + N = 17

Solving
-8 + N = 17

Solving for variable 'N'.

Move all terms containing N to the left, all other terms to the right.

Add '8' to each side of the equation.
-8 + 8 + N = 17 + 8

Combine like terms: -8 + 8 = 0
0 + N = 17 + 8
N = 17 + 8

Combine like terms: 17 + 8 = 25
N = 25

Simplifying
N = 25

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