Question

When a number is multiplied by 4 and then diminished by 7 , the result is 65.What is the number? Tinu is 20 years older than Binu.After 5 years, Tinu will be twice as old as Binu.Find their present ages. A number is twice another number.When the larger is subtracted from 50,the result is 2 more than when the smaller is subtracted from 40.Find the numbers.

Answer 1

Answer:

18, 15 and 35, 8 and 16

Step-by-step explanation:

Let the number be x

4x-7=65

4x=65+7

4x=72

x=72/4

x=18

Let Present age of Binu = x

Therefore, Present age of Banu = x+20

    After 5 years,

        Age of Binu = x+5

        Age of Banu = (x+20)+5

                           = x+25

According to question ,

              x+25 = 2 (x+5)

             x+25 = 2x + 10

                25 = 2x+10 - x

                25 = x+10

                25 - 10 =x

               15 = x

              or x= 15

Therefore binu's present age is 15

                 banu's present age is x=20

                   15+20=35

Let the smaller number be x and

Let the larger number be 2x.

50 - 2x = 40 - x + 2

-2x + x = 42 - 50

- x =  -8

x = 8

Hence the smaller number is 8

Now for bigger number 2x= 2(8)  = 16