21/(x-4)=7

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Solution for 21/(x-4)=7 equation: 



21/(x-4)=7

We move all terms to the left:

21/(x-4)-(7)=0



Domain of the equation: (x-4)!=0

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

x!=4

x∈R



We multiply all the terms by the denominator


-7*(x-4)+21=0

We multiply parentheses

-7x+28+21=0

We add all the numbers together, and all the variables

-7x+49=0

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

-7x=-49

x=-49/-7

x=+7

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