z=21-2.2z

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Solution for z=21-2.2z equation: 



z=21-2.2z

We move all terms to the left:

z-(21-2.2z)=0

We add all the numbers together, and all the variables

z-(-2.2z+21)=0

We get rid of parentheses

z+2.2z-21=0

We add all the numbers together, and all the variables

3.2z-21=0

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

3.2z=21

z=21/3.2

z=6+1/1.7777777777778

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