2x+9=-7x

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Solution for 2x+9=-7x equation: 



2x+9=-7x

We move all terms to the left:

2x+9-(-7x)=0

We get rid of parentheses

2x+7x+9=0

We add all the numbers together, and all the variables

9x+9=0

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

9x=-9

x=-9/9

x=-1

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