9x+21+6x-6=180

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Solution for 9x+21+6x-6=180 equation: 



9x+21+6x-6=180

We move all terms to the left:

9x+21+6x-6-(180)=0

We add all the numbers together, and all the variables

15x-165=0

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

15x=165

x=165/15

x=11

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