(x)/(x+15)=4/9

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Solution for (x)/(x+15)=4/9 equation: 



(x)/(x+15)=4/9

We move all terms to the left:

(x)/(x+15)-(4/9)=0



Domain of the equation: (x+15)!=0

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

x!=-15

x∈R



We add all the numbers together, and all the variables

x/(x+15)-(+4/9)=0

We get rid of parentheses

x/(x+15)-4/9=0

We calculate fractions


9x/(9x+135)+(-4x-60)/(9x+135)=0

We multiply all the terms by the denominator


9x+(-4x-60)=0

We get rid of parentheses

9x-4x-60=0

We add all the numbers together, and all the variables

5x-60=0

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

5x=60

x=60/5

x=12

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