How can we know the peso-dollar exchange? What is the effect of these in our society's and recent problems?

Answer 1

Try online foreign exchange sites like those maintained & posted by banks. Also you can try http://www.oanda.com.

The effects of exchange rates are many & may vary from country to country depending on political & economic situations - too many to be listed here.

Example, there are negative effects/cons of having fixed or floating exchange rates which may lead to balance of payment deficits, shortage of foreign reserves, a country's exports being too expensive or foreign imports too expensive, etc.

Answer 2

50 peso is one us dollar