3z-7=20

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Solution for 3z-7=20 equation: 



3z-7=20

We move all terms to the left:

3z-7-(20)=0

We add all the numbers together, and all the variables

3z-27=0

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

3z=27

z=27/3

z=9

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