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.
Dial telephones came to St. John's in 1948; confederation with the Dominion of Canada was enacted in 1949. Canada's atlantic provinces were originally area code 902, which remains in use throughout Nova Scotia and Prince Edward Island.New Brunswick and Newfoundland were split from 902 to area code 506 in 1955. Newfoundland and Labrador split off as its own area code, 709, in early 1962.Canadian direct distance dial locations came on-line gradually during the next several years, beginning with the largest cities (Montreal montrÃ©al And) toronto in. 1958rea code 709 is the telephone area code in the Canadian province of Newfoundland and Labrador, encompassing the whole province.