Respuesta :

DeanR

u + -78 = -9

We add 78 to both sides,

u = -9 + 78 = 69

Answer: 69

Took me three tries.

janedoe2007

Answer: u = 69

Step-by-step explanation:

u + (-78) = (-9)

u - 78 = (-9)

u = (-9) + 78

u = 78 - 9

u = 69

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