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2+3x-1=4.5
We move all terms to the left:
2+3x-1-(4.5)=0
We add all the numbers together, and all the variables
3x-3.5=0
We move all terms containing x to the left, all other terms to the right
3x=3.5
x=3.5/3
x=1+0.5/3
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