8z-(4-2z)=21

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Solution for 8z-(4-2z)=21 equation: 



8z-(4-2z)=21

We move all terms to the left:

8z-(4-2z)-(21)=0

We add all the numbers together, and all the variables

8z-(-2z+4)-21=0

We get rid of parentheses

8z+2z-4-21=0

We add all the numbers together, and all the variables

10z-25=0

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

10z=25

z=25/10

z=2+1/2

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