Question

20] Given below two pairs of linear equations. State whether each pair has unique solution, or
no solution. Give reasons.
1) 3x + 2y -5=0 2)2x-3y-8=0
2x - 3y - 7 = 0 4x-6y-9=0​

Answer 1

Answer:

1) Here, a1/a2= 3/2, b1/b2= 2/-3 and c1/c2 =-5/-7

hence, a1/a2 is not equal to b1/b2

terefore, given pair of linear equation has

a unique solution.

2) Here, a1/a2= 2/4,b1/b2=-3/-6 and c1/c2=-8/-9.

a1/a2=1/2 ,b1/b2=1/2and c1/c2=-8/-9.

hence, a1/a2=b1/b2.

therefore, given pair of linear equation has

no solution.

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