12x+(9x+3)=234

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Solution for 12x+(9x+3)=234 equation: 



12x+(9x+3)=234

We move all terms to the left:

12x+(9x+3)-(234)=0

We get rid of parentheses

12x+9x+3-234=0

We add all the numbers together, and all the variables

21x-231=0

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

21x=231

x=231/21

x=11

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