Question

15x+12y=9 ; 12x+15y=6

Answer 1

Answer:

15x−12y=69 ...(i)

12x−15y=39 ...(ii)

On adding (i) and (ii) , we get

27x−27y=108

⇒x−y=4

On subtracting (ii) from (i) , we get

3x+3y=30

⇒x+y=10