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6(7+2x)=42
We move all terms to the left:
6(7+2x)-(42)=0
We add all the numbers together, and all the variables
6(2x+7)-42=0
We multiply parentheses
12x+42-42=0
We add all the numbers together, and all the variables
12x=0
x=0/12
x=0
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