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3.9x-4.5=20.46
We move all terms to the left:
3.9x-4.5-(20.46)=0
We add all the numbers together, and all the variables
3.9x-24.96=0
We move all terms containing x to the left, all other terms to the right
3.9x=24.96
x=24.96/3.9
x=6+1/2.5
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