SOLUTION: In this subtraction problem, find the number represented by the answer xy. (each time a letter appears it represents the same digit. Different letters represent different digits.)

Question 389129: In this subtraction problem, find the number represented by the answer xy. (each time a letter appears it represents the same digit. Different letters represent different digits.)
x y z
- z z
_____
x y
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
y = 0 because z-z=0
x = 1 because there would be a third number on the answer line if it were larger than 1.
z = 9 because 10-z=1, -z=-9, z=9
.
109
-99
----
=10
.
Ed
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