5n-21=8n

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Solution for 5n-21=8n equation:


Simplifying
5n + -21 = 8n

Reorder the terms:
-21 + 5n = 8n

Solving
-21 + 5n = 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 + 5n + -8n = 8n + -8n

Combine like terms: 5n + -8n = -3n
-21 + -3n = 8n + -8n

Combine like terms: 8n + -8n = 0
-21 + -3n = 0

Add '21' to each side of the equation.
-21 + 21 + -3n = 0 + 21

Combine like terms: -21 + 21 = 0
0 + -3n = 0 + 21
-3n = 0 + 21

Combine like terms: 0 + 21 = 21
-3n = 21

Divide each side by '-3'.
n = -7

Simplifying
n = -7

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