8x+18=-x

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Solution for 8x+18=-x equation: 



8x+18=-x

We move all terms to the left:

8x+18-(-x)=0

We add all the numbers together, and all the variables

8x-(-1x)+18=0

We get rid of parentheses

8x+1x+18=0

We add all the numbers together, and all the variables

9x+18=0

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

9x=-18

x=-18/9

x=-2

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