1-2n-8n=-9

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Solution for 1-2n-8n=-9 equation: 


Simplifying
1 + -2n + -8n = -9

Combine like terms: -2n + -8n = -10n
1 + -10n = -9

Solving
1 + -10n = -9

Solving for variable 'n'.

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

Add '-1' to each side of the equation.
1 + -1 + -10n = -9 + -1

Combine like terms: 1 + -1 = 0
0 + -10n = -9 + -1
-10n = -9 + -1

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

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

Simplifying
n = 1

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