Question 163509
3x-8y=5
-8y=-3x+5
y=-3x/-8+5/-8
y=3x/8-5/8 (red line).
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4x-2y=11
-2y=-4x+11
y=-4x/-2+11/-2
y=2x-11/2 (green line). 
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{{{ graph( 300, 200, -6, 5, -10, 10, 3x/8 -5/8, 2x -11/2)}}}(graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions 3x/8 -5/8 and 2x -11/2). 
Solution (3,1/2)
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4x-6y=2
-6y=-4x+2
y=-4x/-6+2/-6
y=2x/3-1/3 (red line)
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2x-3y=1
-3y=-2x+1
y=-2x/-3-1/3
y=2x/3-1/3 (green line).
{{{ graph( 300, 200, -6, 5, -10, 10, 2x/3 -1/3, 2x/3 -1/3) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions 2x/3 -1/3 and 2x/3 +1/3). 
Duplicate lines therefore no unique solution for x & y.
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That's how it is done.
I'll leave the rest for you to practice with.