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Advanced mathematics, solving binary equations, what are the detailed steps of the next question, and why are there five groups of solutions?
From the above formula, we can see that X = 3, y = 0 and y = 4.

X = 0,x = 6,y = 2。

Take x = 3 for the uplink and y = 2 for the downlink, (3,2)

Take y = 0 for uplink and x = 0 for downlink, (0,0).

Take y = 0 for uplink and x = 6, (6,0) for downlink.

Take y = 4 for uplink and x = 0 for downlink, (0,4).

Take y = 4 for uplink and x = 6 for downlink, (6,4)

*** 5 groups.