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3.5x-2.5=12
We move all terms to the left:
3.5x-2.5-(12)=0
We add all the numbers together, and all the variables
3.5x-14.5=0
We move all terms containing x to the left, all other terms to the right
3.5x=14.5
x=14.5/3.5
x=4+0.5/3.5
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