(400x-4000)/400x=0.3

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Solution for (400x-4000)/400x=0.3 equation: 



(400x-4000)/400x=0.3

We move all terms to the left:

(400x-4000)/400x-(0.3)=0



Domain of the equation: 400x!=0

x!=0/400

x!=0

x∈R



We add all the numbers together, and all the variables

(400x-4000)/400x-0.3=0

We multiply all the terms by the denominator


(400x-4000)-(0.3)*400x=0

We multiply parentheses

(400x-4000)-120x=0

We get rid of parentheses

400x-120x-4000=0

We add all the numbers together, and all the variables

280x-4000=0

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

280x=4000

x=4000/280

x=14+2/7

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