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x=13.5-2x
We move all terms to the left:
x-(13.5-2x)=0
We add all the numbers together, and all the variables
x-(-2x+13.5)=0
We get rid of parentheses
x+2x-13.5=0
We add all the numbers together, and all the variables
3x-13.5=0
We move all terms containing x to the left, all other terms to the right
3x=13.5
x=13.5/3
x=4+1/2
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