1-2n-8n=21

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Solution for 1-2n-8n=21 equation: 


Simplifying
1 + -2n + -8n = 21

Combine like terms: -2n + -8n = -10n
1 + -10n = 21

Solving
1 + -10n = 21

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 = 21 + -1

Combine like terms: 1 + -1 = 0
0 + -10n = 21 + -1
-10n = 21 + -1

Combine like terms: 21 + -1 = 20
-10n = 20

Divide each side by '-10'.
n = -2

Simplifying
n = -2

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