8x-13+x+21=180

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Solution for 8x-13+x+21=180 equation: 



8x-13+x+21=180

We move all terms to the left:

8x-13+x+21-(180)=0

We add all the numbers together, and all the variables

9x-172=0

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

9x=172

x=172/9

x=19+1/9

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