1990. However MXM is invalid because X should only be subtracted from C and L, not M. 1990 is normally written as MCMXC.
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It is the Hindu-Arabic numeral system.
X=10 in Hindu-Arabic.
What is LXXXIV in hindu arabic
6043 is already in Hindu-Arabic numerals
Exactly as it is 10976 which are Hindu-Arabic numerals