50=-2(21-z)+4(2-4)

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Solution for 50=-2(21-z)+4(2-4) equation: 



50=-2(21-z)+4(2-4)

We move all terms to the left:

50-(-2(21-z)+4(2-4))=0

We add all the numbers together, and all the variables

-(-2(-1z+21)+4(-2))+50=0



We calculate terms in parentheses: -(-2(-1z+21)+4(-2)), so:

-2(-1z+21)+4(-2)

We add all the numbers together, and all the variables

-2(-1z+21)-8

We multiply parentheses

2z-42-8

We add all the numbers together, and all the variables

2z-50

Back to the equation:

-(2z-50)



We get rid of parentheses

-2z+50+50=0

We add all the numbers together, and all the variables

-2z+100=0

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

-2z=-100

z=-100/-2

z=+50

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