Answer:

》Take the number as 'x'

》She doubled x = x × 2 =2

》Then she added 20 to it = 2x + 20

》She divided it by 25 and got answer 4

》Equation

》2x + 20 / 25 =4

》2x + 20 = 4 × 25

》2x + 20 = 100

》2x = 100 - 20

》2x = 80

》x = 80/2

》Ans. :- x=40

Answer:

Let the number be x

when she doubled it becomes 2x

when she added 20 to it the equation becomes 2x+20

when she divide it by 25 the equation becomes 2x+20\25

which resulted 4

The final equation is

2x+20/25=4

2x+20=25*4

2x+20=100

2x=100-20

2x=80

x=80/2

x=40

The number is 40