w+9=-w-9

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Solution for w+9=-w-9 equation: 



w+9=-w-9

We move all terms to the left:

w+9-(-w-9)=0

We add all the numbers together, and all the variables

w-(-1w-9)+9=0

We get rid of parentheses

w+1w+9+9=0

We add all the numbers together, and all the variables

2w+18=0

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

2w=-18

w=-18/2

w=-9

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