x+3(-1-x)=9

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Solution for x+3(-1-x)=9 equation: 



x+3(-1-x)=9

We move all terms to the left:

x+3(-1-x)-(9)=0

We add all the numbers together, and all the variables

x+3(-1x-1)-9=0

We multiply parentheses

x-3x-3-9=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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