N^2=400-X^2

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Solution for N^2=400-X^2 equation: 


Simplifying
N2 = 400 + -1X2

Solving
N2 = 400 + -1X2

Solving for variable 'N'.

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

Simplifying
N2 = 400 + -1X2

Reorder the terms:
-400 + N2 + X2 = 400 + -1X2 + -400 + X2

Reorder the terms:
-400 + N2 + X2 = 400 + -400 + -1X2 + X2

Combine like terms: 400 + -400 = 0
-400 + N2 + X2 = 0 + -1X2 + X2
-400 + N2 + X2 = -1X2 + X2

Combine like terms: -1X2 + X2 = 0
-400 + N2 + X2 = 0

The solution to this equation could not be determined.

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