4z-8=20

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Solution for 4z-8=20 equation: 


Simplifying
4z + -8 = 20

Reorder the terms:
-8 + 4z = 20

Solving
-8 + 4z = 20

Solving for variable 'z'.

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

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

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

Combine like terms: 20 + 8 = 28
4z = 28

Divide each side by '4'.
z = 7

Simplifying
z = 7

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