Question

mary is twice older than her sister, In 5 years time. She will be 2 years older than her sister. Find how old are they both now? ​

Answer 1

Answer:

Let age of mary =m

Let age of her sister =s

Given that, m=2s

After 5 years, mary will be 2 years older than her sister.

(m+5)=(s+5)+2

∴m=s+2

m=2s⇒s+2=2s⇒s=2

∴m=4

Mary is 4 years old and her sister is 2 years old.

Step-by-step explanation:

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Answer 2

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Let age of mary =m

Let age of her sister =s

Given that, m=2s

After 5 years, mary will be 2 years older than her sister.

(m+5)=(s+5)+2

∴m=s+2

m=2s⇒s+2=2s⇒s=2

∴m=4

Mary is 4 years old and her sister is 2 years old.

hope it helps..