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Nicholas asks his teacher “How old are you?” His teacher tells him, “When I was your age you were only 4 years old. When you are my age, I will be 40.” What is the age of the teacher? Thanks for help.

 Jul 10, 2022
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Let teacher's current age ==T
Let the number of years ago==Y
Let Nicholas's current age==N


T - Y ==N...............(1)
T + Y==40..............(2)
N - Y==4.................(3), solve for N, T, Y


T==28 years - teacher's current age
N==16 years - Nicholas's current age
Y==12 years - years ago when Nicholas was 4

 Jul 11, 2022

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