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Answer:
d = 25
Step-by-step explanation:

The value of d has to satisfy the inequality
so replace d with one of the given options

We have to simplify the fraction first

Solving for (x,y)
(x-y=8)
(x=y-8) & (y=x-8)
solving for (y,x)
(2y=2x-16)
(y=x-8)&(x=y+8)