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4.5x+4.8=18.3
We move all terms to the left:
4.5x+4.8-(18.3)=0
We add all the numbers together, and all the variables
4.5x-13.5=0
We move all terms containing x to the left, all other terms to the right
4.5x=13.5
x=13.5/4.5
x=3
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