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Mathematics, 30.03.2021 22:40 whitethunder05

If 20 articles cost ? 90, then the cost of 9 articles is ? A. 45
B 4.50
C.40.50
D. 42

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If 20 articles cost ? 90, then the cost of 9 articles is ? A. 45
B 4.50
C.40.50
D...
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