You can put this solution on YOUR website! IF THIS IS A LINE EQUATON [Y=mX+b] THEN:
X+2Y=8
2Y=-X+8
Y=-X/2+8/2
Y=-X/2+4 THIS IS A LINE WITH A SLOPE (m) OF (-1/2) & A Y INTERCEPT (b) OF (4) (graph 300x200 pixels, x from -10 to 10, y from -10 to 10, y = -x/2 +4).