A way to solve a linear system algebraically is to use the substitution method. The substitution method functions by substituting the one y-value with the other. We're going to explain this by using an example. We can substitute y in the second equation with the first equation since y = y.
Area code 970 is an area code serving most of the western and northern parts of Colorado.It covers Aspen, Vail, Durango, Grand Junction, Fort Collins, and Estes Park.rea code 970 is an area code serving most of the western and northern parts of Colorado.
Area codes 214, 469, and 972. Area codes 214, 469, and 972 are the North American telephone area codes for Dallas, Texas, and most of the eastern portion of the DallasâFort Worth metroplex. The main area code, 214, was one of the original area codes established in October 1947. It originally covered the entire northeastern quadrant of Texas, from Fort Worth to the border with Arkansas and Louisiana. In 1954, most of Tarrant County was combined with much of the eastern portion of area code 915 to form area code 817. Despite Dallas' dramatic growth in the second half of the 20th century, this configuration remained in place for 36 years.