3(2+x)+6x=-21

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Solution for 3(2+x)+6x=-21 equation: 



3(2+x)+6x=-21

We move all terms to the left:

3(2+x)+6x-(-21)=0

We add all the numbers together, and all the variables

3(x+2)+6x-(-21)=0

We add all the numbers together, and all the variables

6x+3(x+2)+21=0

We multiply parentheses

6x+3x+6+21=0

We add all the numbers together, and all the variables

9x+27=0

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

9x=-27

x=-27/9

x=-3

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