Question

The sum of the present ages of Anna and Riya is 18 years. Three years ago. Riya was three times as old as Anna. Find their present age.
word problem give ans properly.​

Answer 1

Answer:

Riya :12

Anna:6

Step-by-step explanation:

let anna by x

and riya be y

(x-3)= 3(y-3)

after 3 years =

x = 3y

3yrs ago their total will be : 12

So their ages 3 yrs ago was 9&3

Riya :12

Anna:6

Answer 2

Let the age of Riya be x and Anna be y

So, According to question,

x+y=18________(1)

3 yrs ago

3(x-3)=y-3

3x-9=y-3

3x-y=6_______(2)

x+y=18

x=18-y

On putting the value of x in the equation,

3x-y=6

18-y-y=6

-2y=-12

y=6

If y = 6 then,

x+y=18

x+6=18

x=12

Therefore:

Riya's age = 12

Anna's age = 6