Question 276471
2x+y=7
y=-2x+7 (red line)
3x-y=-2
-y=-3x-2
y=3x+2 (green line)
{{{ graph( 300, 200, -6, 5, -10, 10, -2x +7, 3x +2) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions -2x +7 and 3x =2). 
One solution (1,5).