20-2z=4

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Solution for 20-2z=4 equation: 


Simplifying
20 + -2z = 4

Solving
20 + -2z = 4

Solving for variable 'z'.

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

Add '-20' to each side of the equation.
20 + -20 + -2z = 4 + -20

Combine like terms: 20 + -20 = 0
0 + -2z = 4 + -20
-2z = 4 + -20

Combine like terms: 4 + -20 = -16
-2z = -16

Divide each side by '-2'.
z = 8

Simplifying
z = 8

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