4x-9+5x=-81

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Solution for 4x-9+5x=-81 equation: 



4x-9+5x=-81

We move all terms to the left:

4x-9+5x-(-81)=0

We add all the numbers together, and all the variables

9x+72=0

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

9x=-72

x=-72/9

x=-8

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