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3x+6-6=2(10.5+3)
We move all terms to the left:
3x+6-6-(2(10.5+3))=0
We add all the numbers together, and all the variables
3x+6-6-(2(13.5))=0
We add all the numbers together, and all the variables
3x-27=0
We move all terms containing x to the left, all other terms to the right
3x=27
x=27/3
x=9
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