Question

Mohan is eight years older than his sister . In three years, he will be twice as old as his sister . What's the age of Mohan and his sister ?​

Answer 1

Answer:

Mohan = 13 years old

Sister= 5 years old

Step-by-step explanation:

Let the sister's age be x

2(x+3) = x+8=3

=> 2x + (2*3) = x + 11

=> 2x + 6 = x + 11

=> 2x + 6 + (-6 - x) = x + 11 + (-6 - x)

=> 2x + 6 + (-x - 6) = x + 11 + (-x - 6)

=> 2x + 6 - x - 6 = x + 11 - x - 6

=> (2x - x) + (6 - 6) = (x - x) + (11 - 6)

=> x = 5

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We know that Mohan was 8 years older than his sister, so he is 13 years old.