15=(30y)/(12+y)

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Solution for 15=(30y)/(12+y) equation: 



15=(30y)/(12+y)

We move all terms to the left:

15-((30y)/(12+y))=0



Domain of the equation: (12+y))!=0

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

y)!=-12

y!=-12/1

y!=-12

y∈R



We add all the numbers together, and all the variables

-(30y/(y+12))+15=0

We multiply all the terms by the denominator


-(30y+15*(y+12))=0



We calculate terms in parentheses: -(30y+15*(y+12)), so:

30y+15*(y+12)

We multiply parentheses

30y+15y+180

We add all the numbers together, and all the variables

45y+180

Back to the equation:

-(45y+180)



We get rid of parentheses

-45y-180=0

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

-45y=180

y=180/-45

y=-4

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