4-7=z.

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Solution for 4-7=z. equation: 



4-7=z.

We move all terms to the left:

4-7-(z.)=0

We add all the numbers together, and all the variables

-(+z.)+4-7=0

We add all the numbers together, and all the variables

-(+z.)-3=0

We get rid of parentheses

-z.-3=0

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

-z.=3

z=3/1

z=3

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