1/3(21x+9)=7x+9

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Solution for 1/3(21x+9)=7x+9 equation: 



1/3(21x+9)=7x+9

We move all terms to the left:

1/3(21x+9)-(7x+9)=0



Domain of the equation: 3(21x+9)!=0

x∈R



We get rid of parentheses

1/3(21x+9)-7x-9=0

We multiply all the terms by the denominator


-7x*3(21x+9)-9*3(21x+9)+1=0

Wy multiply elements

-21x^2(2-27x(2+1=0

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