n+r=12

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Solution for n+r=12 equation: 


Simplifying
n + r = 12

Solving
n + r = 12

Solving for variable 'n'.

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

Add '-1r' to each side of the equation.
n + r + -1r = 12 + -1r

Combine like terms: r + -1r = 0
n + 0 = 12 + -1r
n = 12 + -1r

Simplifying
n = 12 + -1r

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