Find the value of x and y, when

i.

If ,

Then a=e, b=f, c=g, d=h

Given

So, x + y = 8 and x - y = 4

Adding these two gives 2x = 12

y =2

Conclusion : x = 6 and y =2

ii.

Given,

So, 2x+5 = x-3 and 3y-7 = -5

Conclusion : x = -8 and y =

iii.

2x+3 = 7

2y-4 = 14

Conclusion : x = 2 and y = 9

(Given answer is wrong)