Answer:
The exchange rate is the value for which one currency can be exchanged for another. Thus, for example, 20 Mexican pesos are needed to acquire an American dollar.
Technically, it could happen that a country changes its exchange rate with respect to a hard currency (such as the Dollar or the Euro) through fixed exchange rates, in order to increase the value of the salaries of its citizens, measured in international currencies. For example, if the Mexican government fixed a parity between the dollar and the peso of value 1 to 1, the minimum wage of Mexicans would go from being worth $ 215 to multiplying by 20, that is, to $ 4,300.
Now, in practice, this situation is practically impossible, since it would imply a monetary modification in the country that makes the adjustment, since otherwise it would imply an unprecedented inflationary peak.