9x+9=-3x-99

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Solution for 9x+9=-3x-99 equation: 



9x+9=-3x-99

We move all terms to the left:

9x+9-(-3x-99)=0

We get rid of parentheses

9x+3x+99+9=0

We add all the numbers together, and all the variables

12x+108=0

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

12x=-108

x=-108/12

x=-9

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