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 Code Listing From 900 to 999. This page lists all area codes starting with 9 that are accessible from the U.S. and Canada, the state the area code belongs to, and the time zone of all area codes.lease click on the first digit of the area code if you need to find information on another area code: 2. 3. 4. 5. 6. 7. 8. 9. Time Zone. By State. 900. 901. 902. 903.