9(n-4)=81

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Solution for 9(n-4)=81 equation: 


Simplifying
9(n + -4) = 81

Reorder the terms:
9(-4 + n) = 81
(-4 * 9 + n * 9) = 81
(-36 + 9n) = 81

Solving
-36 + 9n = 81

Solving for variable 'n'.

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

Add '36' to each side of the equation.
-36 + 36 + 9n = 81 + 36

Combine like terms: -36 + 36 = 0
0 + 9n = 81 + 36
9n = 81 + 36

Combine like terms: 81 + 36 = 117
9n = 117

Divide each side by '9'.
n = 13

Simplifying
n = 13

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