Question

Twice a number when increase by 7 gives 25. The number is

Answer 1

Answer:

Answer is 9

Step-by-step explanation:

Let the number be 'x'

According to question,

2x + 7 = 25

2x = 25 - 7 = 18

x = 18

2

x = 9

Answer 2

Step-by-step explanation:

let the number be x

twice the number = 2x

when increased by 7 = 2x+7

gives 25

i.e.,

2x+ 7 = 25

2x = 25-7

2x = 18

x = 18/2

x= 9

proof :

2x9+7=25

18+7=25

25=25

hence proved