Answer :

fieryanswererft

Answer:

22.5 and 13.5 are the numbers. average of both numbers is 18.

Step-by-step explanation:

Given that there are two numbers.

let them be, x and y

using the unknown numbers,

  • x + y = 36
  • x - y = 9

make x the subject:

  • x + y = 36
  • x = 36 - y ..........equation 1
  • x - y = 9
  • x = 9 + y ..........equation 2

Solve them simultaneously:

  • 9 + y = 36 - y
  • y + y = 36 - 9
  • 2y = 27
  • y = 13.5

Then another number, x:

  • x = 9 + y
  • x = 9 + 13.5
  • x =22.5

Average:

  • ( sum of both the numbers ) ÷ 2
  • ( 22.5 + 13.5 ) ÷ 2
  • 18
Xignerso

Let the two numbers be x and y

x+y = 36 -----(1)

x - y = = 9-----(2)

(1)+(2)

x +y = 36

x - y = 9

---------------

2x = 45

x = 45/2

Then y =?

x - y =9

45/2 - y =9

y = 45/2-9

y = (45-18)/2

y = 27/2

The two numbers are 45/2 and 27/2

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