Question

(7x + 13 y = 27, 13 x + 7y=33)​

Answer 1

Answer:(x,y)=(2,1)

Step-by-step explanation:

add both you have

20x + 20y=60

20(x+y)=20*3

x+y=3

subtract both you have

-6x + 6y= -6

6(y-x)=6*-1

y-x=-1

multiplying by -1 on both sides we have

x-y=1

adding x-y and x+y we have

2x=4

x=2

y=1

hope it helps

Answer 2

$7x + 13y = 27.(1) \\ 13 x + 7y = 33.(2) \\ multiplying \: by \: 13 \: and \: 7 \: in \: eqution \: (1) \: nd \: (2) \: respectively \: we \: get \: \\ 91 x + 169y = 351 \\ \frac{91xn + 494 = 231}{ } \\ 120y = 120 \\ y = 1 \\ put \: the \: value \: of \: y \: equation \: (1) \: we \: get \: \\ 7x = 13 \times 1 = 27 \\ 7x = 27 - 13 \\ 7x = 14 \\ x = 2 \\ than \: x + y = 2 + 1 = 3$