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3x-2(2x+4)=2x+1
We move all terms to the left:
3x-2(2x+4)-(2x+1)=0
We multiply parentheses
3x-4x-(2x+1)-8=0
We get rid of parentheses
3x-4x-2x-1-8=0
We add all the numbers together, and all the variables
-3x-9=0
We move all terms containing x to the left, all other terms to the right
-3x=9
x=9/-3
x=-3
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