Question

1. If 12x + 13y = 21 and 13x + 12y = 29 then the value of (x - y) is…………

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Answer 1

⠀⠀12x + 13y = 21

(-)⠀13x + 12y = 29

⠀_____________

⠀⠀⠀-x + y = -8

⠀______________

x - y = 8

hope it helps...