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.
AreaCode.org is your one-stop site for area code lookup, area code search, and area code locator. Area code 405 covers the Oklahoma City metro area in the state of Oklahoma. 405 used to serve the entire state, but has been split into 918 and 580. Today, 405 covers only central Oklahoma.05 Area Code 405. At AreaCode.org, you'll find helpful information on the 405 area code, including 405 area code location. Other phone area codes may be found using AreaCode.org's area code locator.