7z+z=40

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Solution for 7z+z=40 equation: 



7z+z=40

We move all terms to the left:

7z+z-(40)=0

We add all the numbers together, and all the variables

8z-40=0

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

8z=40

z=40/8

z=5

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