So, x is just found, x= 3. Now substitute x = 3 in the first equation to find y 2*3 + y = 8, y = 8 - 2*3 = 8 - 6 = 2. ANSWER. The solution is this pair (x,y) = (3,2). CHECK. Substitute these values x …

2018年5月8日 · y=0 Notice that the y terms are additive inverses. Add the two equations together to eliminate them. " "2x+y=8" "...A " "2x-y = 8" "...B A+B" "4x = 16 " "x = 4 If x =4, " "y=0 We …

So the equation is now in slope-intercept form where (the slope) and (the y-intercept) So to graph this equation lets plug in some points Plug in x=0 Multiply Add So here's one point (0,8) Now …

2x + y = 8 2x – y = 0 Log On Algebra: Graphs, graphing equations and inequalities Section. Solvers ...

2016年7月22日 · 2x + y = -8 is the equation of a line. When this line crosses the x-axis the value of the y-coordinate will be zero. Substituting y = 0 into the equation and solving for x gives the …

2017年8月26日 · See a solution process below: First, solve for two points which solve the equation and plot these points: First Point: For x = 0 (2 * 0) + y = 8 0 + y = 8 y = 8 or (0, 8) …

2017年3月12日 · see explanation. To find the intercepts. • " let y = 0, in the equation, for x-intercept" • " let x = 0, in the equation, for y-intercept" y=0to2x+0=8rArrx=4larrcolor(red)" x …

2018年4月11日 · See a solution process below: Step 1) Solve the first equation for y: 2x + y = 8 2x - color(red)(2x) + y = 8 - color(red)(2x) 0 + y = 8 - 2x y = 8 - 2x Step 2) Substitute (8 - 2x) for …

2017年4月9日 · Substituting #0# for #y# in #2x-y=8# #color(white)("XXX")2x-0=8color(white)("xxx")rarrcolor(white)("xxx")x=4# [Some instructors prefer to have the intercept …

2018年1月20日 · See below: x-y>7 2x+y<8 Let's first graph the boundary lines for each graph, then figure out what needs to be shaded. To graph the boundary lines, I'll change the form of …