9x-21=-102

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Solution for 9x-21=-102 equation: 



9x-21=-102

We move all terms to the left:

9x-21-(-102)=0

We add all the numbers together, and all the variables

9x+81=0

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

9x=-81

x=-81/9

x=-9

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