3x-9+6x=180

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Solution for 3x-9+6x=180 equation: 



3x-9+6x=180

We move all terms to the left:

3x-9+6x-(180)=0

We add all the numbers together, and all the variables

9x-189=0

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

9x=189

x=189/9

x=21

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