Respuesta :

Answer:

9

Step-by-step explanation:

Note that two negative signs = one positive sign.

- (-18) = (+18)

Note that one negative & one positive sign = one negative sign

+ (-3) = -3

Simplify:

-6 - 3 + 18 = -9 + 18 = 18 - 9 = 9

9 is your answer

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