Question

hello mate plz help​

Answer 1

Answer:

$\huge\underline\mathcal\red{Gud\: morning!!♡}$

"

$<marquee>$ #Thanka_❤️"

Answer 2

Answer:

x = 5

y = -3

Step-by-step explanation:

Given equations,

12.)

12x + 13y = 29. ...(1)

13x + 12y = 21. ....(2)

(1) × 13

and (2) × 12

we will get,

156x + 169y = 377. ...(3)

156x + 169y = 377. ...(3)156x + 144y = 252. ....(4)

(3) - (2)

156x + 169 - (156x + 144y) = 377 - 252

156x + 169y - 156x - 144y = 125

25y = 125

y = 125/25

y = 5

putting the value of y on (1)

12x + 13y = 29

12x + 13(5) = 29

12x = 29 - 65

12x = -36

x = -36/12

x = -3

y = 5

_____________

15.)

x = 5

y = -3

explaination:

refer to the attachment