80=-10(z-1)

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Solution for 80=-10(z-1) equation: 



80=-10(z-1)

We move all terms to the left:

80-(-10(z-1))=0



We calculate terms in parentheses: -(-10(z-1)), so:

-10(z-1)

We multiply parentheses

-10z+10

Back to the equation:

-(-10z+10)



We get rid of parentheses

10z-10+80=0

We add all the numbers together, and all the variables

10z+70=0

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

10z=-70

z=-70/10

z=-7

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