15=30-n

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Solution for 15=30-n equation:


Simplifying
15 = 30 + -1n

Solving
15 = 30 + -1n

Solving for variable 'n'.

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

Add 'n' to each side of the equation.
15 + n = 30 + -1n + n

Combine like terms: -1n + n = 0
15 + n = 30 + 0
15 + n = 30

Add '-15' to each side of the equation.
15 + -15 + n = 30 + -15

Combine like terms: 15 + -15 = 0
0 + n = 30 + -15
n = 30 + -15

Combine like terms: 30 + -15 = 15
n = 15

Simplifying
n = 15

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