Question 155065
2x=y+1 
y=2x-1 (red line)
2x-y=5
-y=-2x+5
y=2x-5 (green line)
{{{ graph( 300, 200, -6, 5, -10, 10, 2x -1, 2x -5) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions 2x -1 and 2x -5).
NO SOLUTION AS THESE 2 LINES ARE PARALLEL.