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14-02-2021
Mathematics

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A and B are friends and their ages differ by 4 years, A being the elder. A's father D, is twice as old as A, and B is twice as old as his sister C. The age of D and and C differ by 38 years. Find the ages of A and B.

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14-02-2021

Answer:

Step-by-step explanation:

A = B+4

D = 2A

B = 2C

D-C = 38

2A - B/2 = 38

2(B+4) - B/2 = 38

4B+16 - B = 79

3B = 63

B = 21

A = B+4 = 25

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