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-2(2X+X)=28
We move all terms to the left:
-2(2X+X)-(28)=0
We add all the numbers together, and all the variables
-2(+3X)-28=0
We multiply parentheses
-6X-28=0
We move all terms containing X to the left, all other terms to the right
-6X=28
X=28/-6
X=-4+2/3
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