40/x=0.4

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Solution for 40/x=0.4 equation: 



40/x=0.4

We move all terms to the left:

40/x-(0.4)=0



Domain of the equation: x!=0

x∈R



We add all the numbers together, and all the variables

40/x-0.4=0

We multiply all the terms by the denominator


-(0.4)*x+40=0

We multiply parentheses

-0.4x+40=0

We move all terms containing x to the left, all other terms to the right

-0.4x=-40

x=-40/-0.4

x=+100

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