42=-2(x-1)

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Solution for 42=-2(x-1) equation: 



42=-2(x-1)

We move all terms to the left:

42-(-2(x-1))=0



We calculate terms in parentheses: -(-2(x-1)), so:

-2(x-1)

We multiply parentheses

-2x+2

Back to the equation:

-(-2x+2)



We get rid of parentheses

2x-2+42=0

We add all the numbers together, and all the variables

2x+40=0

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

2x=-40

x=-40/2

x=-20

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