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2.5x-10.5=3
We move all terms to the left:
2.5x-10.5-(3)=0
We add all the numbers together, and all the variables
2.5x-13.5=0
We move all terms containing x to the left, all other terms to the right
2.5x=13.5
x=13.5/2.5
x=5+1/2.5
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