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OpenStudy (anonymous):
Volunteer A,B, and C volunteered offered to stuff 754 envelopes with newsletters for a certain reelection campaign. Volunteer A could assemble 137 per hour, volunteer B, 114 per hour, and volunteer C, 134 per hour. They worked a total of 6 hours. The sum of the number of hours that volunteer B and C spent was twice what volunteer A spent. How long did each of them worked?
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