SOLUTION: x years in the future, Sandy will be y years old, z years in the future, Sandy will be how old?

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Question 739112: x years in the future, Sandy will be y years old, z years in the future, Sandy will be how old?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
s is sandy's age now
in x years sandy will be s+x=y
in z years sandy will be s+z
we don't know if x is greater or less than z
we only know that x is greater than zero and y is greater than s