9-6n+4n=78-99

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Solution for 9-6n+4n=78-99 equation: 


Simplifying
9 + -6n + 4n = 78 + -99

Combine like terms: -6n + 4n = -2n
9 + -2n = 78 + -99

Combine like terms: 78 + -99 = -21
9 + -2n = -21

Solving
9 + -2n = -21

Solving for variable 'n'.

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

Add '-9' to each side of the equation.
9 + -9 + -2n = -21 + -9

Combine like terms: 9 + -9 = 0
0 + -2n = -21 + -9
-2n = -21 + -9

Combine like terms: -21 + -9 = -30
-2n = -30

Divide each side by '-2'.
n = 15

Simplifying
n = 15

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