12=4+4z

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Solution for 12=4+4z equation: 



12=4+4z

We move all terms to the left:

12-(4+4z)=0

We add all the numbers together, and all the variables

-(4z+4)+12=0

We get rid of parentheses

-4z-4+12=0

We add all the numbers together, and all the variables

-4z+8=0

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

-4z=-8

z=-8/-4

z=+2

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