3(x+6)=9x-21

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Solution for 3(x+6)=9x-21 equation: 



3(x+6)=9x-21

We move all terms to the left:

3(x+6)-(9x-21)=0

We multiply parentheses

3x-(9x-21)+18=0

We get rid of parentheses

3x-9x+21+18=0

We add all the numbers together, and all the variables

-6x+39=0

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

-6x=-39

x=-39/-6

x=6+1/2

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