Question

5. When a number is doubled and 1 is added to it, the result is 21. Find the
number,​

Answer 1

Answer:

10

Step-by-step explanation:

let original number be x

so 2x+1=21 (acc. to question)

so 2x=20 so x=10

Answer 2

Answer:

let no X

so

X+X+1=21

2x=21-1

2x=20

X=20/2

X=10