Question

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

a. 50          b. 2          c. -2         d. -50​

Answer 1

Answer:

The answer is 2

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

equation 1 ×13= 156x+169y=377

equation 2×12=156x+144y=252

- - -

______________

0 + 25y = 125

y =125/25

y = 5

12x+ 13y=29

12x+13(5) =29

12x = 29-65

x = -36/12

x= -3

x+y= -3+5

= 2

option b

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