X/(72-x)=2/7

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Solution for X/(72-x)=2/7 equation: 



X/(72-X)=2/7

We move all terms to the left:

X/(72-X)-(2/7)=0



Domain of the equation: (72-X)!=0

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

-X!=-72

X!=-72/-1

X!=+72

X∈R



We add all the numbers together, and all the variables

X/(-1X+72)-(+2/7)=0

We get rid of parentheses

X/(-1X+72)-2/7=0

We calculate fractions


7X/(-7X+504)+(2X-144)/(-7X+504)=0

We multiply all the terms by the denominator


7X+(2X-144)=0

We get rid of parentheses

7X+2X-144=0

We add all the numbers together, and all the variables

9X-144=0

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

9X=144

X=144/9

X=16

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