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2x+1.25=3.5
We move all terms to the left:
2x+1.25-(3.5)=0
We add all the numbers together, and all the variables
2x-2.25=0
We move all terms containing x to the left, all other terms to the right
2x=2.25
x=2.25/2
x=1+0.25/2
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