8x+9=-x-3

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Solution for 8x+9=-x-3 equation: 



8x+9=-x-3

We move all terms to the left:

8x+9-(-x-3)=0

We add all the numbers together, and all the variables

8x-(-1x-3)+9=0

We get rid of parentheses

8x+1x+3+9=0

We add all the numbers together, and all the variables

9x+12=0

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

9x=-12

x=-12/9

x=-1+1/3

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