2+7zz=4

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Solution for 2+7zz=4 equation: 



2+7zz=4

We move all terms to the left:

2+7zz-(4)=0

We add all the numbers together, and all the variables

7zz-2=0

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

7zz=2

z=2/1

z=2

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