4/(9x-21)=-40

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Solution for 4/(9x-21)=-40 equation: 



4/(9x-21)=-40

We move all terms to the left:

4/(9x-21)-(-40)=0



Domain of the equation: (9x-21)!=0

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

9x!=21

x!=21/9

x!=2+1/3

x∈R



We add all the numbers together, and all the variables

4/(9x-21)+40=0

We multiply all the terms by the denominator


40*(9x-21)+4=0

We multiply parentheses

360x-840+4=0

We add all the numbers together, and all the variables

360x-836=0

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

360x=836

x=836/360

x=2+29/90

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