Respuesta :

Answer:

-4x + 9y

Step-by-step explanation:

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Answer:

-4x+9y

Step-by-step explanation:

(-x - y) – (3x – 10y)

Distribute the minus sign

-x - y – 3x + 10y

Combine like terms

-x -3x     -y +10y

-4x     +9y