21=2n+8n

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Solution for 21=2n+8n equation:


Simplifying
21 = 2n + 8n

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

Solving
21 = 10n

Solving for variable 'n'.

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

Add '-10n' to each side of the equation.
21 + -10n = 10n + -10n

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

Add '-21' to each side of the equation.
21 + -21 + -10n = 0 + -21

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

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

Divide each side by '-10'.
n = 2.1

Simplifying
n = 2.1

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