Asked by Abby

A second number is three times a first number. A third number is 15 more than the first number. If the sum of the three numbers is 330, find the numbers.
Answered by Graham
Let the numbers be a, b, c
b = 3a
c = 15+a
a+b+c=330

Substitute for b and c in and solve the sum for a.
Use a to determine b and c.
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