Question

The sum of 2 numbers is 25 and their difference is 7. What are the numbers?

Answer 1

Answer:

16 and 9

Step-by-step explanation:

Let x and y be the two numbers.

Then

  x + y = 25      ... (1)

  x - y = 7         ... (2)

Adding these two equations together gives:

(x+y) + (x-y) = 25 + 7

=> 2x = 32

=> x = 16

Putting this into (1) now gives

y = 25 - x = 25 - 16 = 9

Check:

16 + 9 = 25

16 - 9 = 7    

Answer 2

Answer:

the numbers are 16 and 11

Step-by-step explanation:

x+y=25

x-y=7

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

2x=32

x=16

sub x in x+y=27

we get y=27-16=11