=b ∴ 3a+2b=2 ....(iii) 9a−4b=1 ... (iv) On multiplyin g equation ( iii) by 2 and addition of equation (iv) and new one, then we get 6a+4b=4 9a−4b=1 –––––––––– 15a=5 ⇒ a=
5
15
=
1
3
∴
1
x+y
=
1
3
⇒ x+y=3 ...(v) On putting the value of (a) in equation (iii), we get 3×