Question

mary is twice older than her sister in 5 years time sshe will be 2 years older than her sister find how old are they both now

Answer 1

Answer:

Let sister's age be x

Mary's age is 2x (given)

After 5 years,

Sister's age will be x+5

Mary's age will be 2x+5

But,

According to the question,

Mary's age after 5 years = (x+5) + 2

Equating,

2x+5= (x+5) +2

2x+5= x+5+2

2x+5= x+7

2x-x= 7-5 (bringing the like terms together)

x= 2

Therefore,

Sister's age is 2 years

Mary's age is 2x = 2×2= 4 years.