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2(2+x)-4x=12
We move all terms to the left:
2(2+x)-4x-(12)=0
We add all the numbers together, and all the variables
2(x+2)-4x-12=0
We add all the numbers together, and all the variables
-4x+2(x+2)-12=0
We multiply parentheses
-4x+2x+4-12=0
We add all the numbers together, and all the variables
-2x-8=0
We move all terms containing x to the left, all other terms to the right
-2x=8
x=8/-2
x=-4
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