3(3+7x)=12

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Solution for 3(3+7x)=12 equation: 



3(3+7x)=12

We move all terms to the left:

3(3+7x)-(12)=0

We add all the numbers together, and all the variables

3(7x+3)-12=0

We multiply parentheses

21x+9-12=0

We add all the numbers together, and all the variables

21x-3=0

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

21x=3

x=3/21

x=1/7

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