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.
970 Area Code 970. At AreaCode.org, you'll find helpful information on the 970 area code, including 970 area code location. Other phone area codes may be found using AreaCode.org's area code locator. Use the search function for area code look up. Purchase Toll Free with excellent customer service.ajor cities like Durango within area code 970 are also listed on this page. More area codes, including those outside of Colorado, are found on the AreaCode.org homepage. Some telephone area codes are overlaid, requiring 10-digit dialing.