-1=9+n

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Solution for -1=9+n equation:


Simplifying
-1 = 9 + n

Solving
-1 = 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.
-1 + -1n = 9 + n + -1n

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

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

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

Combine like terms: 9 + 1 = 10
-1n = 10

Divide each side by '-1'.
n = -10

Simplifying
n = -10

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