Question

A pair of linear equations which has a unique solution x = 2, y = –3 is a) x – 4y –14 = 0 5x – y – 13 = 0 b) 2x – y = 1 3x + 2y = 0 c) x + y = –1 2x – 3y = –5 d) 2x + 5y = –11 4x + 10y = –22

Answer 1

Answer:

when equations for two lines are given such that:

ax+by+c=0

gx+hx+j=0

then condition for unique solution is a/g is not equal to b/h

therefore answer is:

(a),(c),(d)