Question 169063
y=5x (red line)
2x+y=28
y=-2x+28 (green line)
{{{ graph( 300, 200, -6, 5, -10, 30, y = 5x, -2x +28) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 30, of TWO functions y = 5x and -2x +28).
Ans. (4,20)