-2(8z+20)=4(-5z-15)

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Solution for -2(8z+20)=4(-5z-15) equation: 



-2(8z+20)=4(-5z-15)

We move all terms to the left:

-2(8z+20)-(4(-5z-15))=0

We multiply parentheses

-16z-(4(-5z-15))-40=0



We calculate terms in parentheses: -(4(-5z-15)), so:

4(-5z-15)

We multiply parentheses

-20z-60

Back to the equation:

-(-20z-60)



We get rid of parentheses

-16z+20z+60-40=0

We add all the numbers together, and all the variables

4z+20=0

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

4z=-20

z=-20/4

z=-5

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