20=4(z-1)

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


Simplifying
20 = 4(z + -1)

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

Solving
20 = -4 + 4z

Solving for variable 'z'.

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

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

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

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

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

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

Divide each side by '-4'.
z = 6

Simplifying
z = 6

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