1.

If 12x + 17y = 53 and 17x + 12y = 63 then find the value of (x+y)​

Answer»

12x + 17Y = 53...(1) ×12

17x + 12Y = 63....(2) ×17

then,

144x + 204y = 636

289x + 204y = 1071

(-). (-). (-)

-145x = -435

or, X = 3

another, from (1) no ,

(12×3) + 17y = 53

or, 17y = 17

or, y = 1

Now ,

(x+y) = (3+1)= 4


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