Question

please solve my question

Answer 1

B =S+2
1/3 (S+2-5)=3/7 (S-5)
1/3 (S-3)=3/7 (S-5)
S/3 - 1 = 3S/7 - 15/7
7S-21 = 9S-45
S= 12 , B= 12+2=14
HENCE , present age of brother =14
present age of sister =12

Answer 2

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Here is your answer
Let the sister age is x years
Brother age is ( x +2) years

Five years ago
Sister age is (x -5) years

Brother age is (x + 2 - 5) years
= (x - 3) years
ATQ

$\frac{1}{3} (x - 3) = \frac{3}{7} (x - 5) \\ 7(x - 3) = 9(x - 5) \\ 7x - 21 = 9x - 45 \\ - 21 + 45 = 9x - 7x \\ 24 = 2x \\ x = \frac{24}{2} \\ x = 12$

Therefore
Present age of sister is 12 years
Brother age is 12 + 2 = 14 years

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