Question

The sum of the ages of two sisters is 15 years. The age of the elder sister is twice the younger sister. Find their age.​

Answer 1

Answer:

Let the age of younger sister be x.

Age of elder sister=2x

A.T.Q

x+2x=15

3x=15

x=5

Age of younger sister=x=5 yrs.

Age of elder sister=2x=10 yrs.

Step-by-step explanation:

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Answer 2

Answer:

Answer is 10 years and 5 years respectively

Step-by-step explanation:

Let age of elder sister be x and age of younger sister be y

as per 1st condition

x+y=15 --------(i)

As per second condition

x=2y ---------(ii)

therefore

x+y= 15 ---(from (i) )

2y+y=15 ---(from (ii) )

3y=15

y=5

therefore x=2y

x=2(5)

x=10