5z-(2z+7)-21=8z-3(z-4)

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Solution for 5z-(2z+7)-21=8z-3(z-4) equation: 



5z-(2z+7)-21=8z-3(z-4)

We move all terms to the left:

5z-(2z+7)-21-(8z-3(z-4))=0

We get rid of parentheses

5z-2z-(8z-3(z-4))-7-21=0



We calculate terms in parentheses: -(8z-3(z-4)), so:

8z-3(z-4)

We multiply parentheses

8z-3z+12

We add all the numbers together, and all the variables

5z+12

Back to the equation:

-(5z+12)



We add all the numbers together, and all the variables

3z-(5z+12)-28=0

We get rid of parentheses

3z-5z-12-28=0

We add all the numbers together, and all the variables

-2z-40=0

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

-2z=40

z=40/-2

z=-20

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