30-N=12

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Solution for 30-N=12 equation: 


Simplifying
30 + -1N = 12

Solving
30 + -1N = 12

Solving for variable 'N'.

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

Add '-30' to each side of the equation.
30 + -30 + -1N = 12 + -30

Combine like terms: 30 + -30 = 0
0 + -1N = 12 + -30
-1N = 12 + -30

Combine like terms: 12 + -30 = -18
-1N = -18

Divide each side by '-1'.
N = 18

Simplifying
N = 18

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