x+x-20+x-20=180

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Solution for x+x-20+x-20=180 equation: 



x+x-20+x-20=180

We move all terms to the left:

x+x-20+x-20-(180)=0

We add all the numbers together, and all the variables

3x-220=0

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

3x=220

x=220/3

x=73+1/3

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