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-206=2x+4
We move all terms to the left:
-206-(2x+4)=0
We get rid of parentheses
-2x-4-206=0
We add all the numbers together, and all the variables
-2x-210=0
We move all terms containing x to the left, all other terms to the right
-2x=210
x=210/-2
x=-105
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