This value of x can then be used to find y by substituting 1 with x e.g. in the first equation. The solution of the linear system is (1, 6). You can use the substitution method even if both equations of the linear system are in standard form. Just begin by solving one of the equations for one of its variables. Video lesson: Solve the linear system using the substitution method. 1  Pre-Algebra. 2  Algebra 1.
North American area codes 240 and 301 are telephone area codes for the western half of Maryland. They serve Maryland's portion of the Greater Washington, D.C. , metro area, portions of southern Maryland, and the more rural areas in the western portion of the state.o free up available numbers, the suburban use of 202 was ended in 1990. Despite the presence of the Baltimore-Washington area, 301 remained the exclusive area code for Maryland for 44 years, making Maryland one of the largest states with a single area code.
The northeastern and western portions of area code 303, including Fort Collins, Grand Junction, Vail and Aspen, switched to area code 970 on April 2, 1995, leaving area code 303 to cover its current area. With the 1995 split, 303 is the only Colorado area code that does not border another state.ith the exception mentioned above, all users in the 303/720 area code must dial all ten digits to reach a destination phone, even if that phone is next door. Some users in the area have shortened the two area codes to a single digit with a slash for easy writing.