18=n-7n

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Solution for 18=n-7n equation:


Simplifying
18 = n + -7n

Combine like terms: n + -7n = -6n
18 = -6n

Solving
18 = -6n

Solving for variable 'n'.

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

Add '6n' to each side of the equation.
18 + 6n = -6n + 6n

Combine like terms: -6n + 6n = 0
18 + 6n = 0

Add '-18' to each side of the equation.
18 + -18 + 6n = 0 + -18

Combine like terms: 18 + -18 = 0
0 + 6n = 0 + -18
6n = 0 + -18

Combine like terms: 0 + -18 = -18
6n = -18

Divide each side by '6'.
n = -3

Simplifying
n = -3

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