4x+5=-5x-4.

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Solution for 4x+5=-5x-4. equation: 



4x+5=-5x-4.

We move all terms to the left:

4x+5-(-5x-4.)=0

We add all the numbers together, and all the variables

4x-(-5x-4)+5=0

We get rid of parentheses

4x+5x+4+5=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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