Mathematics, 15.08.2019 07:30, chels8547

Katie, elizabeth, and siobhan volunteer at the hospital. in a week, katie volunteers 3 hours more than elizabeth dpes and siobhan volunteers 1 hour less than elizabeth. over 3 weeks, the number of hours katie volunteers is equal to the sum of elizabeth's and siobhan's volunteer hpirs in 3 weeks.

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Katie, elizabeth, and siobhan volunteer at the hospital. in a week, katie volunteers 3 hours more th...