3(x+3x)=12

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



3(x+3x)=12

We move all terms to the left:

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

We add all the numbers together, and all the variables

3(+4x)-12=0

We multiply parentheses

12x-12=0

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

12x=12

x=12/12

x=1

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