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4x=2(x-7)
We move all terms to the left:
4x-(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)
4x-2x+14=0
We add all the numbers together, and all the variables
2x+14=0
We move all terms containing x to the left, all other terms to the right
2x=-14
x=-14/2
x=-7
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