(4-8n)=20

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Solution for (4-8n)=20 equation: 


Simplifying
(4 + -8n) = 20

Remove parenthesis around (4 + -8n)
4 + -8n = 20

Solving
4 + -8n = 20

Solving for variable 'n'.

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

Add '-4' to each side of the equation.
4 + -4 + -8n = 20 + -4

Combine like terms: 4 + -4 = 0
0 + -8n = 20 + -4
-8n = 20 + -4

Combine like terms: 20 + -4 = 16
-8n = 16

Divide each side by '-8'.
n = -2

Simplifying
n = -2

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