-40=-4(2+2z)

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



-40=-4(2+2z)

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



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

-4(2z+2)

We multiply parentheses

-8z-8

Back to the equation:

-(-8z-8)



We get rid of parentheses

8z+8-40=0

We add all the numbers together, and all the variables

8z-32=0

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

8z=32

z=32/8

z=4

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