-1/3(x+18)=21

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Solution for -1/3(x+18)=21 equation: 



-1/3(x+18)=21

We move all terms to the left:

-1/3(x+18)-(21)=0



Domain of the equation: 3(x+18)!=0

x∈R



We multiply all the terms by the denominator


-21*3(x+18)-1=0

Wy multiply elements

-63x(x-1=0

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