30-4(20-2z)=12(z-6.5)

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Solution for 30-4(20-2z)=12(z-6.5) equation: 



30-4(20-2z)=12(z-6.5)

We move all terms to the left:

30-4(20-2z)-(12(z-6.5))=0

We add all the numbers together, and all the variables

-4(-2z+20)-(12(z-6.5))+30=0

We multiply parentheses

8z-(12(z-6.5))-80+30=0



We calculate terms in parentheses: -(12(z-6.5)), so:

12(z-6.5)

We multiply parentheses

12z-78

Back to the equation:

-(12z-78)



We add all the numbers together, and all the variables

8z-(12z-78)-50=0

We get rid of parentheses

8z-12z+78-50=0

We add all the numbers together, and all the variables

-4z+28=0

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

-4z=-28

z=-28/-4

z=+7

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