Question

What pair of numbers equal 9 and their difference is 7

Answer 1

Answer:

The pair of numbers is (8, 1).

Step-by-step explanation:

Let the number be x and y.

It is provided that:

x + y = 9

x - y = 7

Compute the value of x as follows:

x + y = 9

x - y = 7

______

2x = 16

x = 8

Compute the value of y as follows:

x + y = 9

8 + y = 9

y = 9 - 8

y = 1

Thus, the pair of numbers is (8, 1).

Answer 2

Answer:

X = 8 , Y = 1

Step-by-step explanation:

Let the number be x and y ,

ATQ , x + y = 9 ....... equation 1

x - y = 7 .......... equation 2

From 1st equation we get ,

x = 9 - y

Putting the value in equation 2nd we get ,

9-y-y=7

9-2y=7

2y=2

y =1

Putting the value of y in equation 2nd we get,

x-y = 7

x-1= 7

x = 8