Question

twice of a number added to 5 gives 21​

Answer 1

Answer:

3.5 is the answer hope it will help you

Answer 2

Answer:

let

number is X

twice added = 2×x = 2x. 5 added is 2x+5

result=21

2x+5=21

2x=21-5

2x=16

X=16/2

X=8

Required number is 8