Question

After 20 years, Suresh’s age will be 3 times of his present age, then find his present age

Why in answer there is 3+20=3x

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Answer 1

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$\longrightarrow$let his age be x years

$\longrightarrow$ according to the question = x + 20 = 3x

$\longrightarrow$ 3x - x = 20

$\longrightarrow$ 2x = 20

$\longrightarrow \: x = \frac{20}{2}$

$\longrightarrow$ x = 10 years

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Answer 2

Step-by-step explanation:

let the present age be x

Given that present age is 3 times means 3x

after 20 years = 3x + 20

find the present age i.e. 3x

so 3x + 20 = 3x

3x - 3x = 20

x = 20

present age = 3x = 3 × 20 = 60

why in answer there is 3x + 20 = 3x

Answer : 3x + 20 beacuse 3x is his present age and given after 20 years so after means addition so here it is saying that after 20 years means + 20 , his age that is x will be 3 times so that means present age = 3x so that is why 3x + 20 and why = 3x beacuse it is given in the Question that find present age and his present age is 3x so that is why the equation is 3x + 20 = 3x

Hope it helps!!