Question

X+2y =5;3x+ay+15=0
For what value of a the following system of linear equations has no solution?

Answer 1

answer is 6.

the condition of no solution is

a1/a2=b1/b2 not equal to c1/c2

1/3=2/a

a=6

and

b1/b2=1/3 is not equal to c1/c2 = -5/15= -1/3

feel free to ask if you can't understand.