Question

Find the Value of x + y ,if 12x+13y=29 and 13x+12x =21

Answer 1

I think the second equation is 13x+12y=21
12x+13y=29 (eq. i)
13x+12y=21 (eq. ii)
(i)+(ii)
25x+25y=50
25(x+y)=50
x+y=50/2
x+y=2 (Ans.)

Answer 2

Answer:

x+y=2

Step-by-step explanation:

Given: 12x + 13y=29  and 13x + 12x=21

To find: x + y

Solution:

12x+13y=29 (eq. i)

13x+12y=21 (eq. ii) - (second equation i think should be corrected.so  by    taking this equation i am solving)

From equation (eq. i) & (eq. ii)

⇒25x+25y=50

⇒25(x+y)=50

⇒x+y=50/2

∴x+y=2

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