3(6x+21)=9x

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



3(6x+21)=9x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

-9x+18x+63=0

We add all the numbers together, and all the variables

9x+63=0

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

9x=-63

x=-63/9

x=-7

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