3n-12=78

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Solution for 3n-12=78 equation: 


Simplifying
3n + -12 = 78

Reorder the terms:
-12 + 3n = 78

Solving
-12 + 3n = 78

Solving for variable 'n'.

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

Add '12' to each side of the equation.
-12 + 12 + 3n = 78 + 12

Combine like terms: -12 + 12 = 0
0 + 3n = 78 + 12
3n = 78 + 12

Combine like terms: 78 + 12 = 90
3n = 90

Divide each side by '3'.
n = 30

Simplifying
n = 30

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