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1 + x + y + xy = 15, what is the value of x + y?

If x and y are positive integers and 1 + x + y + xy = 15, what is the value of x + y?
A. 3
B. 5
C. 6
D. 8
E. 9

by sureshtx

Thu Sep 25, 2008 4:40 pm
Forum: Problem Solving
Topic: 1 + x + y + xy = 15, what is the value of x + y?
Replies: 4
Views: 9111