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Mathematics, 08.02.2023 09:10 HealTheWorld

PLEASE HELP!! PLEASE Jane is twice as old as Barbara. Michael is 7 years older than Jane. If Mikael is 21, which equation could be used to find Barbara's age (b)

A.2b-7=21 B.2b+7=21 C. b/2-7=21 D. b/2+7=21

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