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Sitting alone in math
@ "Science and Family Education" answers for you.

Solution: Team A and Team B cooperate to complete1/20+1/30 =112 of the total amount every day.

Team A and Team B completed 6 *112 =1/2 of the total amount in 6 days.

There are 1500/( 1/2)=3000 pieces in this batch.

A: There are 3000 parts in this shipment.

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