-77=-7(z-78)

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Solution for -77=-7(z-78) equation: 



-77=-7(z-78)

We move all terms to the left:

-77-(-7(z-78))=0



We calculate terms in parentheses: -(-7(z-78)), so:

-7(z-78)

We multiply parentheses

-7z+546

Back to the equation:

-(-7z+546)



We get rid of parentheses

7z-546-77=0

We add all the numbers together, and all the variables

7z-623=0

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

7z=623

z=623/7

z=89

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