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Modular Arithmetic
medium
0:00.0
Solve
x
+
4
≡
0
(
m
o
d
9
)
x + 4 \equiv 0 \pmod 9
x
+
4
≡
0
(
mod
9
)
.
A
5
5
5
B
4
4
4
C
0
0
0
D
−
4
-4
−
4
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