8.9=z-4

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Solution for 8.9=z-4 equation: 



8.9=z-4

We move all terms to the left:

8.9-(z-4)=0

We get rid of parentheses

-z+4+8.9=0

We add all the numbers together, and all the variables

-1z+12.9=0

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

-z=-12.9

z=-12.9/-1

z=12+0.9/1

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