15+3n=78

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Solution for 15+3n=78 equation: 


Simplifying
15 + 3n = 78

Solving
15 + 3n = 78

Solving for variable 'n'.

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

Add '-15' to each side of the equation.
15 + -15 + 3n = 78 + -15

Combine like terms: 15 + -15 = 0
0 + 3n = 78 + -15
3n = 78 + -15

Combine like terms: 78 + -15 = 63
3n = 63

Divide each side by '3'.
n = 21

Simplifying
n = 21

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