If 2x + 3y = 12 and 2x - y = 4, what is the value of x?

Which of the following is a solution to the equation x - 2y = 5?

The lines 3x + 4y = 7 and ax + 8y = 14 are coincident. What is the value of a?

For what value of k will the equations x + 2y = 5 and 3x + ky = 15 represent coincident lines?

If x = a and y = b is the solution of the equations x - y = 2 and x + y = 4, then what are the values of a and b respectively?

Find the value of k so that the equations 3x - y - 5 = 0 and 6x - 2y - k = 0 have infinitely many solutions.

The pair of equations x = 0 and x = 5 has:

If the system of equations 2x + 3y = 7 and 2ax + (a + b)y = 28 has infinitely many solutions, then which of the following is correct?

The father's age is six times his son's age. Four years hence, the age of the father will be four times his son's age. The present ages, in years, of the son and the father are, respectively:

The graph of the linear equation y = x passes through the point: