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Question

The sum of three number is 128. The second number is four less then three times the first. The third number is double the first number. What are the three numbers?

Answer 1

The sum of three number is 128

x + y + z = 128

The second number is four less then three times the first

y = 3x - 4

The third number is double the first number.

z = 2x

Substitute:

x + 3x - 4 + 2x = 128

6x = 132

x = 22

y = 62

z = 44