9x-13x-9=-57

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Solution for 9x-13x-9=-57 equation: 



9x-13x-9=-57

We move all terms to the left:

9x-13x-9-(-57)=0

We add all the numbers together, and all the variables

-4x+48=0

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

-4x=-48

x=-48/-4

x=+12

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