SOLUTION: which two numbers have the sum of 7, a difference of 7 and a product of 18?

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Question 556624: which two numbers have the sum of 7, a difference of 7 and a product of 18?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Let a and b be the numbers. Then

a+b = 7
a-b = 7

Therefore b = 0. However if b = 0, then the product of the numbers is 0 and cannot be 18. No two numbers exist.