3n-39=n-9

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Solution for 3n-39=n-9 equation:


Simplifying
3n + -39 = n + -9

Reorder the terms:
-39 + 3n = n + -9

Reorder the terms:
-39 + 3n = -9 + n

Solving
-39 + 3n = -9 + n

Solving for variable 'n'.

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

Add '-1n' to each side of the equation.
-39 + 3n + -1n = -9 + n + -1n

Combine like terms: 3n + -1n = 2n
-39 + 2n = -9 + n + -1n

Combine like terms: n + -1n = 0
-39 + 2n = -9 + 0
-39 + 2n = -9

Add '39' to each side of the equation.
-39 + 39 + 2n = -9 + 39

Combine like terms: -39 + 39 = 0
0 + 2n = -9 + 39
2n = -9 + 39

Combine like terms: -9 + 39 = 30
2n = 30

Divide each side by '2'.
n = 15

Simplifying
n = 15

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