Question

Sonu is grandmother is 80 years old and Sonu is 20 yea Sonu's grandmother is 80 years old and Sonu is 20 years old . How many years ago was his grandmother seven times as old as ?

Answer 1

let it be x years ago,
then, 7(20-x)= (80-x)
140-7x= 80-x
-7x +x= 80 -140
-6x= -60
6x= 60
x = 10

hence,10 years ago is the answer
hope this will help...

Answer 2

Answer:

10 years ago Sonu's Grandmother was seven times as old as him.

Step-by-step explanation:

Let x years ago, Sonu's Grandmother was seven times as old as him.

Current Age of Sonu = 20

Current Age of Sonu's Grandmother = 80

 x years ago,

Sonu's Age = 20 - x

Sonu's Grandmother Age = 80 - x

According to question;

80 - x = 7(20 - x)

80 - x = 140 - 7x

7x - x = 140 - 80

6x = 60

x = 10

Therefore, 10 years ago Sonu's Grandmother was seven times as old as him.

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