=3-4n+9

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Solution for =3-4n+9 equation: 


Simplifying
0 = 3 + -4n + 9

Reorder the terms:
0 = 3 + 9 + -4n

Combine like terms: 3 + 9 = 12
0 = 12 + -4n

Solving
0 = 12 + -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.
0 + 4n = 12 + -4n + 4n
Remove the zero:
4n = 12 + -4n + 4n

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

Divide each side by '4'.
n = 3

Simplifying
n = 3

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