Question

If 8x+5y=30 and 5x+8y=9 then find x+y and x-y.​

Answer 1

Answer:

13x+13y =39

x+y =3

hope it helps u

Answer 2

Question :- 8x+5y=30 ; 5x+8y=9

Find :- x+y

Asnwer :-

8x+5y =30 - 1

5x+8y = 9 - 2

Adding equations 1 and 2

8x+5y = 30

5x+ 8y = 9

-----------------

13x+ 13y = 39

Therefore ,

x + y = 3 - dividing by 13 on both the sides

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