Mathematics, 08.12.2020 23:10 pesinaic

Two customers went to a post office to buy postcards and large envelopes. Each Postcard costs the same amount, and each large envelope costs the same amount. The first customer paid $3.96 for 3 postcards and 2 large envelopes.
The second customer paid $4.89 for 2 postcards and 3 large envelopes.

What was the cost in dollars of each large envelope?

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