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42=7(6-7x)
We move all terms to the left:
42-(7(6-7x))=0
We add all the numbers together, and all the variables
-(7(-7x+6))+42=0
We calculate terms in parentheses: -(7(-7x+6)), so:We get rid of parentheses
7(-7x+6)
We multiply parentheses
-49x+42
Back to the equation:
-(-49x+42)
49x-42+42=0
We add all the numbers together, and all the variables
49x=0
x=0/49
x=0
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