Question

if x+y= 9 then x-y=1 solve this by linear equations ​

Answer 1

Answer:

x = 5 and y = 4

Step-by-step explanation:

hope this answer will help you.

Answer 2

Given question:

x + y = 9......(1)

x - y = 1.......(2)

We use substitution method,

Step (1):

From equation (2)

x - y = 1

- y = 1 - x

y = x - 1......(3)

Step (2):

Substitute (3) in (1)

x + y = 9

x + x -1 = 9

2x = 9 + 1

2x = 10

x = 10/2

x = 5

Step(3):

Substitute x = 4 in (3)

y = 5 - 1

y = 4

Answer:

x = 5

y = 4

It may confuse you. I will verify it.

Using equation (1) and substitute x value and y value.

5 + 4 = 9

9 = 9

Using equation (2) and substitute x value and y value.

5 - 4 = 1

1 = 1

Hence, verified equation (1) and (2)