7x-9x-13=31

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Solution for 7x-9x-13=31 equation: 



7x-9x-13=31

We move all terms to the left:

7x-9x-13-(31)=0

We add all the numbers together, and all the variables

-2x-44=0

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

-2x=44

x=44/-2

x=-22

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