Find the unique solution of the pair of linear equations x + 2y = 5, 7x + 3y = 13.
(1, 2)
x + 2y = 5------(i)
7x + 3y = 13----(ii)
(i) × 3 → 3x+ 6y = 15 -------(iii)
(ii) × 2 → 14x + 6y = 26------(iv)
(iv) - (iii) → 11x = 11 → x = 1.
Substitute the value of x in (i), we get y = 2.
(x, y) =(1, 2)