3(x+7)+3x=12

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



3(x+7)+3x=12

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

3x+3x+21-12=0

We add all the numbers together, and all the variables

6x+9=0

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

6x=-9

x=-9/6

x=-1+1/2

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