9+9x=-81

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Solution for 9+9x=-81 equation: 



9+9x=-81

We move all terms to the left:

9+9x-(-81)=0

We add all the numbers together, and all the variables

9x+90=0

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

9x=-90

x=-90/9

x=-10

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