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

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



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

We move all terms to the left:

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



Domain of the equation: 3(7-7x)!=0

x∈R



We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

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

We multiply all the terms by the denominator


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

Wy multiply elements

63x(-+1=0

We use the square of the difference formula

63x(-1=0

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