25=-7(z-1)-3

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Solution for 25=-7(z-1)-3 equation: 



25=-7(z-1)-3

We move all terms to the left:

25-(-7(z-1)-3)=0



We calculate terms in parentheses: -(-7(z-1)-3), so:

-7(z-1)-3

We multiply parentheses

-7z+7-3

We add all the numbers together, and all the variables

-7z+4

Back to the equation:

-(-7z+4)



We get rid of parentheses

7z-4+25=0

We add all the numbers together, and all the variables

7z+21=0

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

7z=-21

z=-21/7

z=-3

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