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0.4/x=1
We move all terms to the left:
0.4/x-(1)=0
Domain of the equation: x!=0We multiply all the terms by the denominator
x∈R
-1*x+0.4=0
We add all the numbers together, and all the variables
-1x+0.4=0
We move all terms containing x to the left, all other terms to the right
-x=-0.4
x=-0.4/-1
x=0.4/1
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