n+n+n+9=12-4n+7X-4

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Solution for n+n+n+9=12-4n+7X-4 equation: 


Simplifying
n + n + n + 9 = 12 + -4n + 7X + -4

Reorder the terms:
9 + n + n + n = 12 + -4n + 7X + -4

Combine like terms: n + n = 2n
9 + 2n + n = 12 + -4n + 7X + -4

Combine like terms: 2n + n = 3n
9 + 3n = 12 + -4n + 7X + -4

Reorder the terms:
9 + 3n = 12 + -4 + 7X + -4n

Combine like terms: 12 + -4 = 8
9 + 3n = 8 + 7X + -4n

Solving
9 + 3n = 8 + 7X + -4n

Solving for variable 'n'.

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

Add '4n' to each side of the equation.
9 + 3n + 4n = 8 + 7X + -4n + 4n

Combine like terms: 3n + 4n = 7n
9 + 7n = 8 + 7X + -4n + 4n

Combine like terms: -4n + 4n = 0
9 + 7n = 8 + 7X + 0
9 + 7n = 8 + 7X

Add '-9' to each side of the equation.
9 + -9 + 7n = 8 + -9 + 7X

Combine like terms: 9 + -9 = 0
0 + 7n = 8 + -9 + 7X
7n = 8 + -9 + 7X

Combine like terms: 8 + -9 = -1
7n = -1 + 7X

Divide each side by '7'.
n = -0.1428571429 + X

Simplifying
n = -0.1428571429 + X

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