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206+20x=140+30x
We move all terms to the left:
206+20x-(140+30x)=0
We add all the numbers together, and all the variables
20x-(30x+140)+206=0
We get rid of parentheses
20x-30x-140+206=0
We add all the numbers together, and all the variables
-10x+66=0
We move all terms containing x to the left, all other terms to the right
-10x=-66
x=-66/-10
x=6+3/5
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