81-x=-19

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Solution for 81-x=-19 equation: 



81-x=-19

We move all terms to the left:

81-x-(-19)=0

We add all the numbers together, and all the variables

-1x+100=0

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

-x=-100

x=-100/-1

x=+100

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