Question 83472
TO SOLVE THESE LINE EQUATION YOU MUST FIRST CHANGE THEM INTO THE STANDARD EQUATION FOR A LINE THUS:
1A) 2x-y=4, -y=-2x+4, y=2x-4 (red line)
1B) 2x-y=6, -y=-2x+6, y=2x-6 (green line)
{{{ graph( 300, 200, -6, 5, -10, 10, y = 2x -4, y = 2x -6) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = 2x -4 and y = 2x -6).
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2A) X-2Y=8,-2Y=-X+8, Y=-X/-2+8/-2, Y=X/2-4 (RED LINE)
2B) 3X-2Y=12, -2Y=-3X=12, Y=-3X/-2+12/-2, Y=3X/2-6 (GREEN LINE)
{{{ graph( 300, 200, -6, 5, -10, 10, y = x/2 -4, y = 3x/2 -6) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = x/2 -4 and y = 3x/2 -6). 
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I'LL LEAVE THE REST FOR YOU TO PRACTICE WITH!!!!!