Question 428642
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b>
Hi
Solve system of equations by graphing.
x+y=4   OR y = -x +4
y-x=4   OR y =  x +4
both have the same y-intercept (0,4)
{{{drawing(300,300,   -6, 6, -6, 6,  grid(1),
circle(0, 4,0.3),
graph( 300, 300, -6, 6, -6, 6,0-x+4,x+4))}}}