3=z+-4

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Solution for 3=z+-4 equation: 



3=z+-4

We move all terms to the left:

3-(z+-4)=0

We add all the numbers together, and all the variables

-(z-4)+3=0

We get rid of parentheses

-z+4+3=0

We add all the numbers together, and all the variables

-1z+7=0

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

-z=-7

z=-7/-1

z=+7

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