(20-x)-x=2

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



(20-x)-x=2

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-1x-1x+20-2=0

We add all the numbers together, and all the variables

-2x+18=0

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

-2x=-18

x=-18/-2

x=+9

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