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.
This led to a sizeable number of exchanges being divided between two area codes. One central office, the Penn Avenue office in Minneapolis, had its geographical territory divided into area code 612 for portions in Minneapolis; 763 for portions in Golden Valley; and 952 for portions in St. Louis Park.ne central office, the Penn Avenue office in Minneapolis, had its geographical territory divided into area code 612 for portions in Minneapolis; 763 for portions in Golden Valley; and 952 for portions in St. Louis Park.