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-69-2x=4x+99
We move all terms to the left:
-69-2x-(4x+99)=0
We get rid of parentheses
-2x-4x-99-69=0
We add all the numbers together, and all the variables
-6x-168=0
We move all terms containing x to the left, all other terms to the right
-6x=168
x=168/-6
x=-28
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