105/15=210/x

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Solution for 105/15=210/x equation: 



105/15=210/x

We move all terms to the left:

105/15-(210/x)=0



Domain of the equation: x)!=0

x!=0/1

x!=0

x∈R



We add all the numbers together, and all the variables

-(+210/x)+105/15=0

We add all the numbers together, and all the variables

-(+210/x)+7=0

We get rid of parentheses

-210/x+7=0

We multiply all the terms by the denominator


7*x-210=0

We add all the numbers together, and all the variables

7x-210=0

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

7x=210

x=210/7

x=30

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