Question

If 13x+12y=7 and 12x+13y=5 then x-y=?

Answer 1

Answer:

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Step-by-step explanation:

12x+13y=5

⇒ 13x + 12y - x = 5

⇒ 7 - x = 5

∴ x = 2

y = -19/13

x - y = 2 + 19/13

        = 15/13

Answer 2

Answer:

x-y =2

Step-by-step explanation:

13x+12y=7

12x+13y=5

-. -. -

x-y= 2