4(n-1)=-20

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Solution for 4(n-1)=-20 equation: 


Simplifying
4(n + -1) = -20

Reorder the terms:
4(-1 + n) = -20
(-1 * 4 + n * 4) = -20
(-4 + 4n) = -20

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

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

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

Divide each side by '4'.
n = -4

Simplifying
n = -4

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