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.
(Redirected from Area code 304). Area Codes 304 and 681. This map is clickable; click on an area code to go to the page for that code. North American telephone area code 304 was established October 1947 as one of the original area codes, and serves all of the U.S. state of West Virginia.It was overlaid with area code 681, effective March 28, 2009.Due to West Virginia's low population density, it was one of the last remaining states with only one area code. However, in 2007, news reports indicated that West Virginia would soon need a new area code. Permissive ten-digit local dialing of numbers in the existing 304 area code would begin no later than July 26, 2008. ( 2 During this period, local 304 calls could still be dialed with just seven digits.). 3  Mandatory ten-digit local dialing of existing 304 numbers took effect on February 28, 2009.