2z+7z=18

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Solution for 2z+7z=18 equation: 



2z+7z=18

We move all terms to the left:

2z+7z-(18)=0

We add all the numbers together, and all the variables

9z-18=0

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

9z=18

z=18/9

z=2

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