Question 130447
Y=3X (RED LINE)
Y=X-4 (GREEN LINE)
{{{ graph( 300, 200, -6, 5, -10, 10, 3x, x -4) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions 3x and x-4). 
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SOLUTION=(-2,-6)