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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