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-2x-7(6x+1)=213
We move all terms to the left:
-2x-7(6x+1)-(213)=0
We multiply parentheses
-2x-42x-7-213=0
We add all the numbers together, and all the variables
-44x-220=0
We move all terms containing x to the left, all other terms to the right
-44x=220
x=220/-44
x=-5
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