4(z-1)=20

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


Simplifying
4(z + -1) = 20

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

Solving
-4 + 4z = 20

Solving for variable 'z'.

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

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

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

Combine like terms: 20 + 4 = 24
4z = 24

Divide each side by '4'.
z = 6

Simplifying
z = 6

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