If r = 3, y =k is a solution of the equation 3x – 4y +7 = 0, then the value of k is
(a) 16
(b) -16
(c) 4
(d) 4
Solution:
(c) 4
The solution of the pair of linear equations 2x – y = 5 and 5x y = 11 is
(a) x = -1, y = 2
(b) x = 2,y = -1
(c) x = 0,y = -5
(d) x = 5/2 ,y = 0
Solution:
(b) x = 2,y = -1
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