1/3(6x+21)=x-7

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Solution for 1/3(6x+21)=x-7 equation: 



1/3(6x+21)=x-7

We move all terms to the left:

1/3(6x+21)-(x-7)=0



Domain of the equation: 3(6x+21)!=0

x∈R



We get rid of parentheses

1/3(6x+21)-x+7=0

We multiply all the terms by the denominator


-x*3(6x+21)+7*3(6x+21)+1=0

Wy multiply elements

-3x^2(6+21x(6+1=0

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