3(n-1)=9+n

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Solution for 3(n-1)=9+n equation:


Simplifying
3(n + -1) = 9 + n

Reorder the terms:
3(-1 + n) = 9 + n
(-1 * 3 + n * 3) = 9 + n
(-3 + 3n) = 9 + n

Solving
-3 + 3n = 9 + n

Solving for variable 'n'.

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

Add '-1n' to each side of the equation.
-3 + 3n + -1n = 9 + n + -1n

Combine like terms: 3n + -1n = 2n
-3 + 2n = 9 + n + -1n

Combine like terms: n + -1n = 0
-3 + 2n = 9 + 0
-3 + 2n = 9

Add '3' to each side of the equation.
-3 + 3 + 2n = 9 + 3

Combine like terms: -3 + 3 = 0
0 + 2n = 9 + 3
2n = 9 + 3

Combine like terms: 9 + 3 = 12
2n = 12

Divide each side by '2'.
n = 6

Simplifying
n = 6

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