-3n-4=20

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Solution for -3n-4=20 equation: 


Simplifying
-3n + -4 = 20

Reorder the terms:
-4 + -3n = 20

Solving
-4 + -3n = 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 + -3n = 20 + 4

Combine like terms: -4 + 4 = 0
0 + -3n = 20 + 4
-3n = 20 + 4

Combine like terms: 20 + 4 = 24
-3n = 24

Divide each side by '-3'.
n = -8

Simplifying
n = -8

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