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20*1/5+d=23

We move all terms to the left:

20*1/5+d-(23)=0

determiningTheFunctionDomain d-23+20*1/5=0

We multiply all the terms by the denominator

d*5-23*5+20*1=0

We add all the numbers together, and all the variables

d*5-95=0

Wy multiply elements

5d-95=0

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

5d=95

d=95/5

d=19

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