x^2+3n=18

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Solution for x^2+3n=18 equation: 


Simplifying
x2 + 3n = 18

Reorder the terms:
3n + x2 = 18

Solving
3n + x2 = 18

Solving for variable 'n'.

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

Add '-1x2' to each side of the equation.
3n + x2 + -1x2 = 18 + -1x2

Combine like terms: x2 + -1x2 = 0
3n + 0 = 18 + -1x2
3n = 18 + -1x2

Divide each side by '3'.
n = 6 + -0.3333333333x2

Simplifying
n = 6 + -0.3333333333x2

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