7=7z+6z

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Solution for 7=7z+6z equation: 



7=7z+6z

We move all terms to the left:

7-(7z+6z)=0

We add all the numbers together, and all the variables

-(+13z)+7=0

We get rid of parentheses

-13z+7=0

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

-13z=-7

z=-7/-13

z=7/13

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