7/(2x+21)=90

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Solution for 7/(2x+21)=90 equation: 



7/(2x+21)=90

We move all terms to the left:

7/(2x+21)-(90)=0



Domain of the equation: (2x+21)!=0

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

2x!=-21

x!=-21/2

x!=-10+1/2

x∈R



We multiply all the terms by the denominator


-90*(2x+21)+7=0

We multiply parentheses

-180x-1890+7=0

We add all the numbers together, and all the variables

-180x-1883=0

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

-180x=1883

x=1883/-180

x=-10+83/180

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