Question

Reetu is 7 years old now.. Rehan's age is 4 time as that of Reetu before 4 years.
what will be Reetu and rehan's age in 2024?​

Answer 1

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Reetu is 7 years old now

Rehan's age is 4 time as that of Reetu before 4 years.

what will be Reetu and rehan's age in 2024?

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let the present age of reetu be 'x'

let the present age of rehan be 'y'

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applying condition (1),

(rehan's age)×4 = reetu's age before 4 years

replacing variables in the above equation

(y) =( x - 4 )× 4

==> y = 4x - 16 .........................(1)

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given:

reetu is 7 years old.

replacing value of reetu (x) in equation 1

$\tt y = 4((7) - 4)$

$\tt ===> y = 3×4$

$\boxed{\tt ===> y = 12}$

the current age of rehan is 12 years.

in 2024 the ages of reetu and Rehan would be 4 years greater than their current ages

reetu's age= 7+4=11

rehan's age = 12+4=16

the ages are 11 and 16 respectively.

hope this helps!!

Answer 2

reetu is 7 years old.

replacing value of reetu (x) in equation 1

= 3*4

the current age of rehan is 12 years.

in 2024 the ages of reetu and Rehan would be 4 years greater than their current ages

reetu's age= 7+4=11

rehan's age = 12+4=16

the ages are 11 and 16 respectively.