-21+n=n+7(n+2)

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Solution for -21+n=n+7(n+2) equation:


Simplifying
-21 + n = n + 7(n + 2)

Reorder the terms:
-21 + n = n + 7(2 + n)
-21 + n = n + (2 * 7 + n * 7)
-21 + n = n + (14 + 7n)

Reorder the terms:
-21 + n = 14 + n + 7n

Combine like terms: n + 7n = 8n
-21 + n = 14 + 8n

Solving
-21 + n = 14 + 8n

Solving for variable 'n'.

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

Add '-8n' to each side of the equation.
-21 + n + -8n = 14 + 8n + -8n

Combine like terms: n + -8n = -7n
-21 + -7n = 14 + 8n + -8n

Combine like terms: 8n + -8n = 0
-21 + -7n = 14 + 0
-21 + -7n = 14

Add '21' to each side of the equation.
-21 + 21 + -7n = 14 + 21

Combine like terms: -21 + 21 = 0
0 + -7n = 14 + 21
-7n = 14 + 21

Combine like terms: 14 + 21 = 35
-7n = 35

Divide each side by '-7'.
n = -5

Simplifying
n = -5

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