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50-2x=6x-138
We move all terms to the left:
50-2x-(6x-138)=0
We get rid of parentheses
-2x-6x+138+50=0
We add all the numbers together, and all the variables
-8x+188=0
We move all terms containing x to the left, all other terms to the right
-8x=-188
x=-188/-8
x=23+1/2
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