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50=-2(x-7)
We move all terms to the left:
50-(-2(x-7))=0
We calculate terms in parentheses: -(-2(x-7)), so:We get rid of parentheses
-2(x-7)
We multiply parentheses
-2x+14
Back to the equation:
-(-2x+14)
2x-14+50=0
We add all the numbers together, and all the variables
2x+36=0
We move all terms containing x to the left, all other terms to the right
2x=-36
x=-36/2
x=-18
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