Three figures - numbers

The sum of three numbers, if each is 10% larger than the previous one, is 662. Determine the figures.

Correct result:

a =  200
b =  220
c =  242

Solution:

a+b+c = 662
b = 1.10 a
c = 1.10 b

a+b+c = 662
b = 1.10•a
c = 1.10•b

a+b+c = 662
1.1a-b = 0
1.1b-c = 0

a = 200
b = 220
c = 242

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