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104=2(7x+3)
We move all terms to the left:
104-(2(7x+3))=0
We calculate terms in parentheses: -(2(7x+3)), so:We get rid of parentheses
2(7x+3)
We multiply parentheses
14x+6
Back to the equation:
-(14x+6)
-14x-6+104=0
We add all the numbers together, and all the variables
-14x+98=0
We move all terms containing x to the left, all other terms to the right
-14x=-98
x=-98/-14
x=+7
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