Question

find 2 numbers whose sum is 18 and difference is 2?​

Answer 1

Answer:

10 and 8

Step-by-step explanation:

x+y=18

~x=18-y -------(i)

x-y=2

~x=y+2 --------(ii)

From (i) and (ii)

18-y=y+2

~2y=18-2

~2y=16

~y=16÷2

~y=8

Thus y=8

From (i)

x=18-y

~x=18-8

~x=10

Thus the two numbers are 10 and 8

Answer 2

Answer:   The two numbers are 8 and 10

Step-by-step explanation:    

x + y = 18

x - y = 2

y = 18 - x

x - [ 18 - x ] = 2

x - 18 + x = 2

2x - 18 = 2

2x = 20

x = 10

10 + y = 18

y = 8

10 + 8 = 18

10 - 8 = 2

Hence the two numbers are 10 and 8!!!

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