-9=7z+2(-5z+9)

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Solution for -9=7z+2(-5z+9) equation: 



-9=7z+2(-5z+9)

We move all terms to the left:

-9-(7z+2(-5z+9))=0



We calculate terms in parentheses: -(7z+2(-5z+9)), so:

7z+2(-5z+9)

We multiply parentheses

7z-10z+18

We add all the numbers together, and all the variables

-3z+18

Back to the equation:

-(-3z+18)



We get rid of parentheses

3z-18-9=0

We add all the numbers together, and all the variables

3z-27=0

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

3z=27

z=27/3

z=9

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