Question

Jody is 56 years old and has 3 grandchildren - Trent, Kennedy and Leslee​.

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​Trent is twice as old as Kennedy, who is 4 years younger than Leslee.

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​The grandchildren's ages added together are half of Jody's age.

​How old is Trent?

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Answer 1

Trent is 12.

Explanation:

T = 2K (Trent is twice as old as Kennedy)

K = L - 4 (Kennedy is 4 years younger than Leslee)

2 (L - 4) + L - 4 + L = 28

Tom Kennedy Leslee

2L - 8 + L + 4 + L = 28

4L = 28 - 8 - 4

4L = 40

L = 10 (Leslee is 10)

Plug in L into Trent's age):

2 (L - 4)

2 (10 - 4)

2 (6)

12 (Trent's age)

And, of course, Kennedy must be 6 because 28 - 10 - 12 = 6

Answer 2

Answer: Brent is 16 years old

Step-by-step explanation: i don’t know if this is correct but the way i did it was, 8 + 8=16, 16 + 8 = 24, then 8 - 4 = 4, 16 + 8 + 4 = 28.