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Solving Equations with Linear Expressions on One Side and Numbers on the Other Side

Twenty years ...

Question

Twenty years from now, Arjun will become three times as old as he is now. His present age is

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Solution

The correct option is A 10
Let Arjun be x years old now

After 20 years, his age will be x + 20
According to question,
x + 20 = 3x or 3x = x + 20
3x - x = 20
2x = 20
x = 10

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