-2(x-1)=20

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Solution for -2(x-1)=20 equation: 



-2(x-1)=20

We move all terms to the left:

-2(x-1)-(20)=0

We multiply parentheses

-2x+2-20=0

We add all the numbers together, and all the variables

-2x-18=0

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

-2x=18

x=18/-2

x=-9

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