42=z-3

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Solution for 42=z-3 equation: 



42=z-3

We move all terms to the left:

42-(z-3)=0

We get rid of parentheses

-z+3+42=0

We add all the numbers together, and all the variables

-1z+45=0

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

-z=-45

z=-45/-1

z=+45

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