42=z+9

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Solution for 42=z+9 equation: 



42=z+9

We move all terms to the left:

42-(z+9)=0

We get rid of parentheses

-z-9+42=0

We add all the numbers together, and all the variables

-1z+33=0

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

-z=-33

z=-33/-1

z=+33

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