If $\frac{x}{2} = \frac{6}{y} = 2$,then the value of $x - y$ is ..........

The graph of the pair of equations $2x + y = 7$ and $5x - 2y = 4$ is:

If the following pair of equations does not have any solution,then find the value of $k$:
$3x - 4y + 7 = 0$
$kx + 3y - 5 = 0$

The average age of Ina,Mina,and Dika is $x$ years. After $y$ years,what will be their average age?

Solve the following pair of linear equations using a graph: $3x + 4y = 6$ and $3x + 4y = 19$.

Graphically,solve the following pair of equations:
$2x + y = 6$
$2x - y + 2 = 0$
Find the ratio of the areas of the two triangles formed by the lines representing these equations with the $x$-axis and the lines with the $y$-axis.