84-2d=80

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Solution for 84-2d=80 equation: 



84-2d=80

We move all terms to the left:

84-2d-(80)=0

We add all the numbers together, and all the variables

-2d+4=0

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

-2d=-4

d=-4/-2

d=+2

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