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.
The incumbent local exchange carrier in 306 and 639 is SaskTel. The main area code, 306, is one of the original 86 area codes assigned in 1947, in the contiguous United States and the then-nine-province extent of Canada.Saskatchewan's second area code, 639, was introduced in 2012, and is an overlay of 306.Despite Saskatchewan's small population, 306 was on the verge of exhaustion due to Canada's inefficient number allocation system.he main area code, 306, is one of the original 86 area codes assigned in 1947, in the contiguous United States and the then-nine-province extent of Canada.