SOLUTION: The first three digits of Sophie’s telephone number are 279. If 70 is added to Sophie’s age, this sum is 5939 less than three times the number formed by the last four digits of Sop

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Question 271718: The first three digits of Sophie’s telephone number are 279. If 70 is added to Sophie’s age, this sum is 5939 less than three times the number formed by the last four digits of Sophie’s phone number. If Sophie is 30 years old, what is her telephone number?
Answer by dabanfield(803) About Me  (Show Source):
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The first three digits of Sophie’s telephone number are 279. If 70 is added to Sophie’s age, this sum is 5939 less than three times the number formed by the last four digits of Sophie’s phone number. If Sophie is 30 years old, what is her telephone number?
0 solutions
Let x be the last four digits of Sophie's phone number. Then
30 + 70 = 3*x - 5939
3x = 100 + 5939
3x = 6039
x = 2013
The number then is 279-2013.