20=4-2z

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Solution for 20=4-2z equation:


Simplifying
20 = 4 + -2z

Solving
20 = 4 + -2z

Solving for variable 'z'.

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

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

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

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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