Bob's age is now 3 times of Tom's age. Twelve years from now, tom will be 15 years old. How old is Bob now?

please explain and show work

b = Bob's age now

t = Tom's age now
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age now is b = 3t
age in 12 years for t is t+12 = 15

Therefore, t now is 3 (that's 15-12 = 3)
b age now is 3*3 = 9

But if bob is 16 how old is tom

10

To find Bob's current age, we need to follow a step-by-step process:

Step 1: Determine Tom's age twelve years from now.
Given that Tom will be 15 years old twelve years from now, we can subtract twelve from 15:
Tom's age = 15 - 12 = 3 years old

Step 2: Determine Bob's current age.
The problem states that Bob's age is currently three times Tom's age. To find Bob's age, we need to multiply Tom's age by 3:
Bob's age = 3 * Tom's age
Bob's age = 3 * 3 = 9 years old

Therefore, Bob is currently 9 years old.