Question 71668
Y=3x+y
y=x-2 now substitute (x-2) for y in equation #1.
Y=3x+x-2
Y=4x-2
{{{ graph( 300, 200, -6, 5, -10, 10, y = 4x -2) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = 4x -2).