40=-4(-4-2z)

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Solution for 40=-4(-4-2z) equation: 



40=-4(-4-2z)

We move all terms to the left:

40-(-4(-4-2z))=0

We add all the numbers together, and all the variables

-(-4(-2z-4))+40=0



We calculate terms in parentheses: -(-4(-2z-4)), so:

-4(-2z-4)

We multiply parentheses

8z+16

Back to the equation:

-(8z+16)



We get rid of parentheses

-8z-16+40=0

We add all the numbers together, and all the variables

-8z+24=0

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

-8z=-24

z=-24/-8

z=+3

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