(120-x)/x=0.4

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Solution for (120-x)/x=0.4 equation: 



(120-x)/x=0.4

We move all terms to the left:

(120-x)/x-(0.4)=0



Domain of the equation: x!=0

x∈R



We add all the numbers together, and all the variables

(-1x+120)/x-(0.4)=0

We add all the numbers together, and all the variables

(-1x+120)/x-0.4=0

We multiply all the terms by the denominator


(-1x+120)-(0.4)*x=0

We multiply parentheses

(-1x+120)-0.4x=0

We get rid of parentheses

-1x-0.4x+120=0

We add all the numbers together, and all the variables

-1.4x+120=0

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

-1.4x=-120

x=-120/-1.4

x=85+1/1.4

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