-21-4n=7-8n

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Solution for -21-4n=7-8n equation:


Simplifying
-21 + -4n = 7 + -8n

Solving
-21 + -4n = 7 + -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 + -4n + 8n = 7 + -8n + 8n

Combine like terms: -4n + 8n = 4n
-21 + 4n = 7 + -8n + 8n

Combine like terms: -8n + 8n = 0
-21 + 4n = 7 + 0
-21 + 4n = 7

Add '21' to each side of the equation.
-21 + 21 + 4n = 7 + 21

Combine like terms: -21 + 21 = 0
0 + 4n = 7 + 21
4n = 7 + 21

Combine like terms: 7 + 21 = 28
4n = 28

Divide each side by '4'.
n = 7

Simplifying
n = 7

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