<PRE><B>Question 168759</B>
1. 7x+3y+2=3+7y+6x+11 
7x-6x+3y-7y=11-2
x-4y=9
-4y=-x+9
y=-x/-4+9/-4
y=x/4-9/4 ans.(red line)
2. 2x+5y+7=4x+3y-5
2x-4x+5y-3y=-5-7
-2x+2y=-12
2y=2x-12
y=2x/2-12/2
y=x-6 (green line)
{{{ graph( 300, 200, -6, 6, -10, 10, x/4 -9/4, x -6) }}} (graph 300x200 pixels, x from -6 to 6, y from -10 to 10, of TWO functions x/4 -9/4 and x -6). 
Ans. (5,-1)</PRE>