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.
972 is the area code for Dallas, Texas and its suburbs. 972 overlays both the 214 and 469 area codes, requiring 10-digit dialing in the entire Dallas region. Counties served by 972 include Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Navarro, and Rockwall.72 is the area code for Dallas, Texas and its suburbs. 972 overlays both the 214 and 469 area codes, requiring 10-digit dialing in the entire Dallas region. Counties served by 972 include Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Navarro, and Rockwall.