1.

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

Answer»

The given pair of equations is 

12x + 17y = 53 ……..(i) 

17x + 12y = 63 …….(ii) 

Adding (i) and (ii), we get 

29x + 29y = 116 

⇒ x + y = 4 (Dividing by 4) 

Hence, the value of x + y is 4.



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