9x+4x-144=129

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Solution for 9x+4x-144=129 equation: 



9x+4x-144=129

We move all terms to the left:

9x+4x-144-(129)=0

We add all the numbers together, and all the variables

13x-273=0

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

13x=273

x=273/13

x=21

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