[ Text problems (other) ]

In the thirtieth kingdom, there are two exchange offices. The first one gives 3000 tugriks for a ruble but charges a 7000 tugriks commission for the exchange, while the second one gives only 2950 tugriks for a ruble but does not charge any commission. A tourist noticed that it makes no difference to him which of these offices he exchanges his money at. How many rubles does he plan to exchange?

#
Since the tourist does not care which exchange office to use, before the commission is deducted, in the first exchange office, for all the rubles he intends to exchange, the tourist will receive 7000 tugriks more. Since for each ruble the tourist receives 50 tugriks more in the first office than in the second, he intends to exchange $7000: 50=140$ rubles.

## Answer

140 rubles.