21x+105=7(3x+15)

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Solution for 21x+105=7(3x+15) equation: 



21x+105=7(3x+15)

We move all terms to the left:

21x+105-(7(3x+15))=0



We calculate terms in parentheses: -(7(3x+15)), so:

7(3x+15)

We multiply parentheses

21x+105

Back to the equation:

-(21x+105)



We get rid of parentheses

21x-21x-105+105=0

We add all the numbers together, and all the variables

=0

x=0/1

x=0

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