42=-7(z-)

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



42=-7(z-)

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



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

-7(+z)

We multiply parentheses

-7z

Back to the equation:

-(-7z)



We get rid of parentheses

7z+42=0

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

7z=-42

z=-42/7

z=-6

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