x=2(180-x)-20

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Solution for x=2(180-x)-20 equation: 



x=2(180-x)-20

We move all terms to the left:

x-(2(180-x)-20)=0

We add all the numbers together, and all the variables

x-(2(-1x+180)-20)=0



We calculate terms in parentheses: -(2(-1x+180)-20), so:

2(-1x+180)-20

We multiply parentheses

-2x+360-20

We add all the numbers together, and all the variables

-2x+340

Back to the equation:

-(-2x+340)



We get rid of parentheses

x+2x-340=0

We add all the numbers together, and all the variables

3x-340=0

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

3x=340

x=340/3

x=113+1/3

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