Question

If 12x + 13y =29 and 13x +12y = 21 , then findx+y

Answer 1

Step-by-step explanation:

12x + 13y = 29

(+) 13x + 12y = 21

————————————

25x + 25y = 50

=> 25 ( x + y ) = 50

=> x + y = 50/25

=> x + y = 2

Answer 2

Answer:

2

Step-by-step explanation:

12x + 13y =29

13x + 12y =21

adding both the equations

12x + 13y + 13x + 12y = 29+21

25x + 25 y = 50

x+y = 2