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x-20.5=2x+43-2x-15
We move all terms to the left:
x-20.5-(2x+43-2x-15)=0
We add all the numbers together, and all the variables
x-20.5-28=0
We add all the numbers together, and all the variables
x-48.5=0
We move all terms containing x to the left, all other terms to the right
x=48.5
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