Question 235857
y = 2x – 1 (red line)
y = -3x + 9  (green line)
{{{ graph( 300, 200, -6, 5, -10, 10, 2x -1, -3x +9) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions 2x -1 and -3x +9). 
y = 2x – 1
y = -3x + 9 subtract these 2 equations.
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0=5x-10
5x=10
x=10/5
x=2 ans.
y=2*2-1
y=4-1
y=3 ans.
Intersect=(2,3)