3(x+7)=21+3x

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



3(x+7)=21+3x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

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

We get rid of parentheses

3x-3x-21+21=0

We add all the numbers together, and all the variables

=0

x=0/1

x=0

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