Sonu's grandmother is 80 years old and Sonu is 20 years old. how many years ago was his grandmother 7 times as old as Son? (line

Question

3 years ago

13

ar equations in one variable)

1 answer:

Aleks [24] · Answer 1 · 2022-04-21T03:05:16+03:00

Aleks [24]3 years ago

6 0

Answer:

10 years ago

Step-by-step explanation:

Let x be the number of years ago

x years ago,

Sonu's grandmother was 80 - x

Sonu was 20 - x

x years ago,

the grandmother was 7 times as old as Sonu

80 - x = 7(20 - x)

80 - x = 140 - 7x

6x = 60

x = 10