3(2+7)=3x+21

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



3(2+7)=3x+21

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(3x+21)+39=0

We get rid of parentheses

-3x-21+39=0

We add all the numbers together, and all the variables

-3x+18=0

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

-3x=-18

x=-18/-3

x=+6

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