40-x=-2

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Solution for 40-x=-2 equation: 



40-x=-2

We move all terms to the left:

40-x-(-2)=0

We add all the numbers together, and all the variables

-1x+42=0

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

-x=-42

x=-42/-1

x=+42

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