(20-3x)+x=180

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Solution for (20-3x)+x=180 equation: 



(20-3x)+x=180

We move all terms to the left:

(20-3x)+x-(180)=0

We add all the numbers together, and all the variables

(-3x+20)+x-180=0

We add all the numbers together, and all the variables

x+(-3x+20)-180=0

We get rid of parentheses

x-3x+20-180=0

We add all the numbers together, and all the variables

-2x-160=0

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

-2x=160

x=160/-2

x=-80

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