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.
State: FL-Florida. Active: True. The 407 Area code is the area code for the Orlando metro area including all of Orange, Osceola, and Seminole counties, as well as small portions of Volusia and Lake counties.rom 1947 until 1989, the 407 area code was part of the 305 Area code, which included the east coast from Brevard County southward, including the Florida Keys. After the split, 407 included the former 305 Area code from Palm Beach County northward, and the Orlando metro area.