Question

28. If a = b(mod m) and c = d(mod m) then
a+c=b + d(mod m), a – c = b – d(mod m)
and ac = bd(mod m)
If 23 = 13(mod 5) and 30 = -5(mod 5) then
7 = 18(mod 5)
—7 = 18(mod 5)
1 = 18(mod 5)
-1 = 18(mod 5)​

Answer 1

Answer:

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