2(2z-4)=20

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Solution for 2(2z-4)=20 equation: 



2(2z-4)=20

We move all terms to the left:

2(2z-4)-(20)=0

We multiply parentheses

4z-8-20=0

We add all the numbers together, and all the variables

4z-28=0

We move all terms containing z to the left, all other terms to the right

4z=28

z=28/4

z=7

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