Question 162749
x+2y=3
x=5-2y or x+2y=5
x+2y=3 
-(x+2y=5) now subtract.
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0x+0y=-2
No solution for x & y as these two equations represent parallel lines if graphed.
{{{ graph( 300, 200, -6, 5, -10, 10, -x/2 +3/2, -x/2 +5/2) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions -x/2 +3/2 and -x/2 +5/2).