z+70=2(z+20)

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Solution for z+70=2(z+20) equation: 



z+70=2(z+20)

We move all terms to the left:

z+70-(2(z+20))=0



We calculate terms in parentheses: -(2(z+20)), so:

2(z+20)

We multiply parentheses

2z+40

Back to the equation:

-(2z+40)



We get rid of parentheses

z-2z-40+70=0

We add all the numbers together, and all the variables

-1z+30=0

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

-z=-30

z=-30/-1

z=+30

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