42=-7(z-8)

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Solution for 42=-7(z-8) equation: 



42=-7(z-8)

We move all terms to the left:

42-(-7(z-8))=0



We calculate terms in parentheses: -(-7(z-8)), so:

-7(z-8)

We multiply parentheses

-7z+56

Back to the equation:

-(-7z+56)



We get rid of parentheses

7z-56+42=0

We add all the numbers together, and all the variables

7z-14=0

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

7z=14

z=14/7

z=2

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