7z-9=3z+31

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Solution for 7z-9=3z+31 equation: 



7z-9=3z+31

We move all terms to the left:

7z-9-(3z+31)=0

We get rid of parentheses

7z-3z-31-9=0

We add all the numbers together, and all the variables

4z-40=0

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

4z=40

z=40/4

z=10

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