18=3-z

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Solution for 18=3-z equation: 



18=3-z

We move all terms to the left:

18-(3-z)=0

We add all the numbers together, and all the variables

-(-1z+3)+18=0

We get rid of parentheses

1z-3+18=0

We add all the numbers together, and all the variables

z+15=0

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

z=-15

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