21d+75-29d=19

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Solution for 21d+75-29d=19 equation: 



21d+75-29d=19

We move all terms to the left:

21d+75-29d-(19)=0

We add all the numbers together, and all the variables

-8d+56=0

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

-8d=-56

d=-56/-8

d=+7

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