Question

if 13x+7y=23 and 7x+13y=17 then x-y ​

Answer 1

Answer:

3

Step-by-step explanation:

7x+13y=27....(i)

13x+7y=33....(ii)

Multiplying by 13 and 7 in equation (i) and (ii) respectively, we get

91x+169y=351

−

9

1x

−

+

49y=

−

2

31

120y=120

y=1

Put the value of y in equation (i), we get

7x+13×1=27

⇒7x=27−13

⇒7x=14

⇒x=2

Then x+y=2+1=3.

Answer 2

x = 73.5

y = 0.5

hope my answer satisfies the question