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1680/x=1.28
We move all terms to the left:
1680/x-(1.28)=0
Domain of the equation: x!=0We add all the numbers together, and all the variables
x∈R
1680/x-1.28=0
We multiply all the terms by the denominator
-(1.28)*x+1680=0
We multiply parentheses
-1.28x+1680=0
We move all terms containing x to the left, all other terms to the right
-1.28x=-1680
x=-1680/-1.28
x=1312+0.63999999999987/1.28
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