(40-x)/x=35/21

Solution for (40-x)/x=35/21 equation:

(40-x)/x=35/21

We move all terms to the left:

(40-x)/x-(35/21)=0


Domain of the equation: x!=0

x∈R


We add all the numbers together, and all the variables

(-1x+40)/x-(+35/21)=0

We get rid of parentheses

(-1x+40)/x-35/21=0

We calculate fractions


(-21x+840)/21x+(-35x)/21x=0

We multiply all the terms by the denominator


(-21x+840)+(-35x)=0

We get rid of parentheses

-21x-35x+840=0

We add all the numbers together, and all the variables

-56x+840=0

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

-56x=-840

x=-840/-56

x=+15