2x + y - 28 = 0 and x - y - 5 = 0, the pair of equations has/have ______.
Pair of linear equations x + 2y + 5 = 0 and 3x + 6y -1 = 0 have
The pair of linear equations x + y + 10 = 0 and x + y - 7 = 0 has: