Question

10/x+y+2/x-y=4;15/x-y-5/x+y=-2​

Answer 1

Answer:

please confirm your question

Step-by-step explanation:

let, 1/x+y=u & 1/x-y=v

10u+2v=4...(i). -5u+15v=-2.....(ii)

elimination method

(i)×15=150u+30v=60

(ii)×2=-10u+30v=-4

(i)-(ii)=160u=64

=u=2/5

putting the value of u in eqn (i)

10×2/5+2v=4

=2v=0

=v=0

1/x+y=2/5; 1/x-y=0

x=5-2y/2....(iii)

x-y=0

=x=y

=5-2y/2=y

=5-2y=2y

=y=5/4

putting the value of y in eqn (iii)

x=(5-2×5/4)/2

x=5/4

hopes it helps you.