Solve graphically each of the following systems of linear equations. Also find the coordinates of the points where the lines meet axis of y.

Solution:

(i) The given equations are 

$2 x-5 y+4=0$...(i)

$2 x+y-8=0$ ..(ii)

The two points satisfying (i) can be listed in a table as,

The two points satisfying (ii) can be listed in a table as,

Now, graph of equations (i) and (ii) can be drawn as,

It is seen that the solution of the given system of equations is given by x = 3, y = 2.

Also, it is observed that the lines (i) and (ii) meet the $y$-axis at the points $\left(0, \frac{4}{5}\right)$ and $(0,8)$ respectively.

(ii) The given equations are 

$3 x+2 y=12$....(i)

 

$5 x-2 y=4$...(ii)

The two points satisfying (i) can be listed in a table as,

It is seen that the solution of the given system of equations is given by x = 2, y = 3.

Also, it is observed that the lines (i) and (ii) meet the $y$-axis at the points $(0,6)$ and $(0,-2)$ respectively.

(iii) The given equations are 

$2 x+y-11=0$..(i)

 

$x-y-1=0$..(ii)

The two points satisfying (i) can be listed in a table as,

It is seen that the solution of the given system of equations is given by x = 4, y = 3.

Also, it is observed that the lines (i) and (ii) meet the $y$-axis at the points $(0,11)$ and $(0,-1)$ respectively.

(iv) The given equations are 

$x+2 y-7=0$...(i)

 

$2 x-y-4=0$....(ii)

The two points satisfying (i) can be listed in a table as,

It is seen that the solution of the given system of equations is given by x = 3, y = 2.

Also, it is observed that the lines (i) and (ii) meet the $v$-axis at the points $(0,3.5)$ and $(0,-4)$ respectivelv.(v) The given equations are

$3 x+y-5=0$...(i)

 

$2 x-y-5=0$....(ii)

The two points satisfying (i) can be listed in a table as,

It is seen that the solution of the given system of equations is given by x = 2, y = −1.

Also, it is observed that the lines (i) and (ii) meet the $y$-axis at the points $(0,5)$ and $(0,-5)$ respectively.

(vi) The given equations are 

$2 x-y-5=0$..(i)

 

$x-y-3=0$..(ii)

The two points satisfying (i) can be listed in a table as,

It is seen that the solution of the given system of equations is given by x = 2, y = −1.

Also, it is observed that the lines (i) and (ii) meet the $y$-axis at the points $(0,-3)$ and $(0,-5)$ respectively.