4=-4.2+z

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Solution for 4=-4.2+z equation: 



4=-4.2+z

We move all terms to the left:

4-(-4.2+z)=0

We add all the numbers together, and all the variables

-(z-4.2)+4=0

We get rid of parentheses

-z+4.2+4=0

We add all the numbers together, and all the variables

-1z+8.2=0

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

-z=-8.2

z=-8.2/-1

z=8+0.2/1

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