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=Using the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 only once,...

=Using the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 only once, find all the possible 3 digit number plus another 3 digit number to equal a 4 digit number. (No repetition of numbers is allowed.) One example is 589+437=1026.

We are asked to find ALL the possibilities. I know it has to do with combinations, but I'm not quite sure if I'm using it the proper way.

Math   Statistics-And-Probability   
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