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

Answer:

10 years ago

Step-by-step explanation:

it would be 10 years ago because if sonu's grandmother is 80, and he/she is 20, when sonu was 10, the grandmother would be 70. 10×7=70.

Answer 2

Answer:

x=10

Step-by-step explanation:

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...