12=9+z/4

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Solution for 12=9+z/4 equation: 



12=9+z/4

We move all terms to the left:

12-(9+z/4)=0

We add all the numbers together, and all the variables

-(z/4+9)+12=0

We get rid of parentheses

-z/4-9+12=0

We multiply all the terms by the denominator


-z-9*4+12*4=0

We add all the numbers together, and all the variables

-1z+12=0

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

-z=-12

z=-12/-1

z=+12

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