40-20x=x-2

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Solution for 40-20x=x-2 equation: 



40-20x=x-2

We move all terms to the left:

40-20x-(x-2)=0

We get rid of parentheses

-20x-x+2+40=0

We add all the numbers together, and all the variables

-21x+42=0

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

-21x=-42

x=-42/-21

x=+2

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