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Question -

Represent the following pair of equations graphically and write the coordinates of points where the lines intersects y-axis
x + 3y = 6
2x – 3y = 12 (C.B.S.E. 2008)



Answer -

x + 3y = 6
x = 6 – 3y
Substituting some different values of y, we get their corresponding values of x as shown below
 
Now plot these points on the graph and join them
Similarly in the equation
2x – 3y = 12 => 2x = 12 + 3y
x =  
 
Now plot there points and join them We see that these two lines meet y-axis at (0, 2) and (0, -4)

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