24-04-2017
Mathematics

contestada

What number should be added to 51 to get a sum -21

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sdmatera sdmatera

24-04-2017

We can write out a formula in order to solve this. Since sum represents addition, if x represents the unknown number, we can write the formula: x+51=-21. Then, to solve for x, you would subtract 51 from both sides to get x=-72 which is the final answer.

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osvaughn13 osvaughn13

24-04-2017

51 + -72 = -21
Adding a negative seventy-two to fifty-one will give you a sum of negative twenty-one

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