Definition of Substitution Method. One way to solve systems of equations is by substitution. In this method, solve an equation for one variable, then substitute that solution in the other equation, and solve.
Area code 407 is found in the US state of Florida. Primarily servicing the city of Orlando (population: 921360), area code 407 covers 5 counties of Florida.Located in the Eastern time zone, area code 407 is on the same time as New York, NY. Area code 407 was brought into effect on April 16, 1988.407 was split from the parent 305 area code.rimarily servicing the city of Orlando (population: 921360), area code 407 covers 5 counties of Florida. Located in the Eastern time zone, area code 407 is on the same time as New York, NY.
These included Area Code 204 - Manitoba, Area Code 306 - Saskatchewan, Area Code 403 - Alberta, Area Code 416 - Ontario, Area Code 418 - Quebec, Area Code 514 - Quebec, Area Code 604 - British Columbia, Area Code 613 - Ontario, Area Code 902 - Nova Scotia, Prince Edward Island and New Brunswick.n 2013 four new area codes were implemented in Canada. Ontario implemented two new area codes 437 and 365 on March 25, 2013. Area code 437 is an overlay of area codes 416 and 647 and area code 365 is an overlay of area codes 905 and 289.