Math, asked by lithya14, 11 months ago

sonus grandmother is 80 years old and Sonu is 20 years old. How many years ago was his grandmother 7 times as old as Sony

Answers

Answered by janvitha

4

Answer:

10

Step-by-step explanation:

Let x years ago was his grandmother 7 times as old as Sony

80-x = 7(20-x) = 140 - 7x

60 = 6x

x = 10

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