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x/4.2=12.8
We move all terms to the left:
x/4.2-(12.8)=0
We add all the numbers together, and all the variables
x/4.2-12.8=0
We multiply all the terms by the denominator
x-(12.8)*4.2=0
We add all the numbers together, and all the variables
x-53.76=0
We move all terms containing x to the left, all other terms to the right
x=53.76
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