Is the following pair of linear equation consistent / inconsistent? If consistent, obtain the solution graphically.

$x-y=8 ,$   $3x-3y=16$

Is the following pair of linear equation consistent / inconsistent? If consistent, obtain the solution graphically.

$2x+y-6=0,$ $4x-2y-4=0$

Given the linear equation $2x+3y-8=0$, write another linear equation in two variables such that the geometrical representation of the pair so formed is parallel lines.

Given the linear equation is $2x+3y-8=0$. Write another linear equation in two variables such that the geometrical representation of the pair so formed is coincident lines

Solve the following pair of linear equations by the substitution method:

$x+y=14$

$x-y=4$