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02-05-2021
Mathematics

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What number must be added to -9 to equal +4?

Respuesta :

02-05-2021

Answer:

[tex]13[/tex]

Step-by-step explanation:

let the unknown number be x

[tex]x + ( - 9) = 4 \\ x - 9 = 4 \\ x = 4 + 9 \\ x = 13[/tex]

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