Question

the sum of two odd numbers is 21 find the number

Answer 1

x+x+2=2x+2
2x+2=21
x=21/2+2
x= 12.5

Answer 2

Hi mate here is your answer

We don't know the sum of which two number is 21.

Let take this two numbers will be X.

X+X=21

2X =21

X =21/2

X. =?

We can't cut 2 and 21 because it's not divided.

Then,

X=10.5