18=6+z

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Solution for 18=6+z equation: 



18=6+z

We move all terms to the left:

18-(6+z)=0

We add all the numbers together, and all the variables

-(z+6)+18=0

We get rid of parentheses

-z-6+18=0

We add all the numbers together, and all the variables

-1z+12=0

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

-z=-12

z=-12/-1

z=+12

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