8n+39=12n-9

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Solution for 8n+39=12n-9 equation:


Simplifying
8n + 39 = 12n + -9

Reorder the terms:
39 + 8n = 12n + -9

Reorder the terms:
39 + 8n = -9 + 12n

Solving
39 + 8n = -9 + 12n

Solving for variable 'n'.

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

Add '-12n' to each side of the equation.
39 + 8n + -12n = -9 + 12n + -12n

Combine like terms: 8n + -12n = -4n
39 + -4n = -9 + 12n + -12n

Combine like terms: 12n + -12n = 0
39 + -4n = -9 + 0
39 + -4n = -9

Add '-39' to each side of the equation.
39 + -39 + -4n = -9 + -39

Combine like terms: 39 + -39 = 0
0 + -4n = -9 + -39
-4n = -9 + -39

Combine like terms: -9 + -39 = -48
-4n = -48

Divide each side by '-4'.
n = 12

Simplifying
n = 12

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