x-3(x+7)=-9

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Solution for x-3(x+7)=-9 equation: 



x-3(x+7)=-9

We move all terms to the left:

x-3(x+7)-(-9)=0

We add all the numbers together, and all the variables

x-3(x+7)+9=0

We multiply parentheses

x-3x-21+9=0

We add all the numbers together, and all the variables

-2x-12=0

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

-2x=12

x=12/-2

x=-6

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