If $A=65+2.2 t$ And $B=25+4.2 t$ Represent the Population (In Millions) of Two Countries

Short Answer

If $A=65+2.2 t$ and $B=25+4.2 t$ represent the population (in millions) of two countries, $A$ and $B$ , then in what year will the population of country $A$ double the population of country $B$ ? Round to 2 decimal places.