Question

please answer this questions ​

Answer 1

Answer:

ammu's age = 5 x 10 times =50 age of father

ammu's age = now 8 years x 4 times

= ammu's present age is 8 years and father's present age is 82 year's

Step-by-step explanation:

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Answer 2

problem 1 )

Answer: first number is 3

             second number is 6

let the first number be x

let the second number be y

given :

           3x +2y = 21 -------- i

           5x-2y =3 ------------ ii

On solving : add i and ii

              8x  =  24

               x    =  24 / 8

               x    =  3

Subsititute

                x  =  3  in  i

                3 ( 3) + 2y =21

               9 + 2y        =21

               2y   =   12

               y     =    6

problem 2 )

Answer : the original number is 73

let x and y be the tens and ones digit in the given 2 digit number respectively

Given :

             x + y = 10  ----------------------- i

            10y + x = ( 10x + y ) - 36

            9x - 9y = 36--------------------- ii

solve i an ii

we get x = 7 and y = 3

therefore the number is 73

Problem 3 )

Answer : Fathr's age = 33

               Ammu's age = 6

                   let father's present age be x

                   let  ammu's present age be y

5 years ago

                  (x - 5 )      = 10 (y - 5 )

                   x - 5        = 10y -50

                   x - 10 y    = 5 -50

                   x   -10 y   = -45 ------------------ i

after three years

                   ( x + 3 ) = 4 (y + 3

                            x = 4y + 12 - 3

                     x - 4y = 9 ------------------------ii

i - ii

y = 6

substuting y = 6 in i

x = 33