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16-2(3x+4)=20
We move all terms to the left:
16-2(3x+4)-(20)=0
We add all the numbers together, and all the variables
-2(3x+4)-4=0
We multiply parentheses
-6x-8-4=0
We add all the numbers together, and all the variables
-6x-12=0
We move all terms containing x to the left, all other terms to the right
-6x=12
x=12/-6
x=-2
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