(81-2)xN=4xN+9

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Solution for (81-2)xN=4xN+9 equation: 


Simplifying
(81 + -2) * xN = 4xN + 9

Combine like terms: 81 + -2 = 79
(79) * xN = 4xN + 9

Reorder the terms:
79xN = 9 + 4xN

Solving
79xN = 9 + 4xN

Solving for variable 'x'.

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

Add '-4xN' to each side of the equation.
79xN + -4xN = 9 + 4xN + -4xN

Combine like terms: 79xN + -4xN = 75xN
75xN = 9 + 4xN + -4xN

Combine like terms: 4xN + -4xN = 0
75xN = 9 + 0
75xN = 9

Divide each side by '75N'.
x = 0.12N-1

Simplifying
x = 0.12N-1

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