Question

Jenifer is 7, times as old as his granddaughter emma . Three years ago , Jenifer was 10 times as old as emma . find the present age of jeniffer and emma​

Answer 1

Answer:

Jennifer's age is 63 and Emma's age is 9

Answer 2

Answer:

• Present age of Jenifer = 63 years
• Present age of Emma (Jenifer's granddaughter) = 9 years

Step-by-step explanation:

Let

• Jenifer's age be x
• Jenifer's granddaughter Emma's age be y

It is given that

Jenifer is 7 times as old as Emma

→ x = 7y

3 years ago,

• Jenifer's age = (x - 3)
• Emma's age = (y - 3)

★ According to the question,

(x - 3) = 10 (y - 3)

⇒ x - 3 = 10y - 30

⇒ x = 10y - 30 + 3

⇒ x = 10y - 27

⇒ 7y = 10y - 27

⇒ 7y - 10y = -27

⇒ -3y = -27

⇒ y = -27 ÷ -3

⇒ y = 9

∴ Present age of Emma = 9 years

For finding the age of Jenifer,

x = 7y

→ x = 7 (9)

→ x = 63

∴ Present age of Jenifer = 63 years