Question 152932
y=-1/2x-3 (red line)
y=-7/2x+3 (green line) I'll assume the second =sign should be a +
{{{ graph( 300, 200, -3, 3, -3, 3, x/2 -3, -7x/2 +3) }}} (graph 300x200 pixels, x from -3 to 3, y from -3 to 3, of TWO functions x/2 -3 and -7x/2 +3). 
answer (1.5,2.25)