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-6=3(x-7)
We move all terms to the left:
-6-(3(x-7))=0
We calculate terms in parentheses: -(3(x-7)), so:We get rid of parentheses
3(x-7)
We multiply parentheses
3x-21
Back to the equation:
-(3x-21)
-3x+21-6=0
We add all the numbers together, and all the variables
-3x+15=0
We move all terms containing x to the left, all other terms to the right
-3x=-15
x=-15/-3
x=+5
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