7-28=-7(-9-6z)

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Solution for 7-28=-7(-9-6z) equation: 



7-28=-7(-9-6z)

We move all terms to the left:

7-28-(-7(-9-6z))=0

We add all the numbers together, and all the variables

-(-7(-6z-9))+7-28=0

We add all the numbers together, and all the variables

-(-7(-6z-9))-21=0



We calculate terms in parentheses: -(-7(-6z-9)), so:

-7(-6z-9)

We multiply parentheses

42z+63

Back to the equation:

-(42z+63)



We get rid of parentheses

-42z-63-21=0

We add all the numbers together, and all the variables

-42z-84=0

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

-42z=84

z=84/-42

z=-2

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