<human>:  Four friends ordered four pizzas for a total of 64 dollars. If two of the pizzas cost 30 dollars, how much did each of the other two pizzas cost if they cost the same amount?
<bot>: How much did the other two pizzas cost in total? ** The other two pizzas cost 64-30 = <<64-30=34>>34 dollars.
How much did each of the other two pizzas cost? ** Each of the other two pizzas cost 34/2 = <<34/2=17>>17 dollars each.
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