Which of the following is not a linear equation

Which of the following is a linear equation in one variable?

Which of the following is a linear equation in one variable ?

Which of the following pairs of linear equations are consistent ? Obtain solution in such cases graphically :- x-3y=4 , 2x+y=-6 .

Which of the following pairs of linear equations are consistent ? Obtain solution in such cases graphically :- 2x+6y=5 , x+3y=2 .

Which of the following pairs of linear equations are consistent ? Obtain solution in such cases graphically :- x+y=3 , 2x+5y=12.

Which of the following pairs of linear equations are consistent ? Obtain solution in such cases graphically :- 3x+2y=8 , 2x-3y=1 .

Which of the following pairs of linear equations are consistent ? Obtain solution in such cases graphically :- 2x-3y=5 , 6x-4y=3 .

Which of the following pairs of linear equations are consistent ? Obtain solution in such cases graphically :- 6x+2y=5 , 3x+y=2.

Which of the following pairs of linear equations are consistent ? Obtain solution in such cases graphically :- x+3y=6, 2x-3y=12