Question

1/x+y = 1/x-y = 1/3 then x and y are​

Answer 1

Step-by-step explanation:

1/x + y ...let it be equ 1

1/x - y .....let it be equ 2

adding both the equ we get

1/x + y + 1/x -y = 1/3 + 1/3

2/x = 2/3

2x = 6

x = 3

now substitute x in equ 1

1/3 + y = 1/3

y = 0.

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Answer 2

Let the cost of a notebook to be = ₹ x

Let the cost of a pen to be = ₹ y

According to the question,

The cost of a notebook is twice the cost of a pen.

i.e., Cost of a notebook = 2×Cost of a pen

x = 2×y

x = 2y

x-2y = 0

x-2y = 0 is the linear equation in two variables to represent the statement ‘The cost of a notebook is twice the cost of a pen’.