-4
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You can use whatever you want but must be equal on every item.

12_4_5=0

1_4_5=1

2_4_5=2

3_4_5=3

4_4_5=4

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closed as unclear what you're asking by Glorfindel, F1Krazy, Chowzen, TwoBitOperation, Alex May 2 '18 at 17:37

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • 1
    $\begingroup$ Is there any particular set of operations that is allowed? Allowing anything to be used can lead to brute force solving with square roots, factorials, and rounding. Is each _ supposed to be replaced with exactly one symbol or can they be replaced with multiple or none? Also, do you have a source for the puzzle? Puzzles from others are okay in most cases, but require attribution to the creator. $\endgroup$ – Apep May 2 '18 at 17:34
5
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I'll take a guess and say that:

12 monkeys 4 dolphins 5 kangaroos = 0 cows, 1 boat 4 hooks 5 humans = 1 human killer shark

I can't figure out the rest.

I'm saying this is really unclear as to what you want us to do. Is this homework? Is this a competition thing? what can we use?

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