3(2x-7)=3x-(21x-3x)=

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Solution for 3(2x-7)=3x-(21x-3x)= equation: 



3(2x-7)=3x-(21x-3x)=

We move all terms to the left:

3(2x-7)-(3x-(21x-3x))=0

We add all the numbers together, and all the variables

3(2x-7)-(3x-(+18x))=0

We multiply parentheses

6x-(3x-(+18x))-21=0



We calculate terms in parentheses: -(3x-(+18x)), so:

3x-(+18x)

We get rid of parentheses

3x-18x

We add all the numbers together, and all the variables

-15x

Back to the equation:

-(-15x)



We get rid of parentheses

6x+15x-21=0

We add all the numbers together, and all the variables

21x-21=0

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

21x=21

x=21/21

x=1

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