If x + y = 10 and x - y = 12, then

Show graphically that the system of equations 2x + 4y = 10 and 3x + 6y = 12 has no solution.

Show graphically that the system of equations 2x + 4y = 10 and 3x + 6y = 12 has no solution.

If (x+y) = 12 and (x-y) = 4 then (2x - 4y) = ?

For the system of equations 5x - 3y =k and 10 x - 6y = 12 to be inconsistent, the value of k should not be equal to ________.

If 12 x + 17 y = 53 and 17 x + 12 y = 63 then find the values of (x + y )