Solve the System by the Addition Method $$\begin{array} { l } x + y = - 6 \\x - y = 12\end{array}$$

question 2

Multiple Choice

Solve the system by the addition method.
- $$\begin{array} { l } x + y = - 6 \\x - y = 12\end{array}$$

• A) \(\{ ( 6 , - 9 ) \}\)
• B) \(\{ ( 6,3 ) \}\)
• C) \(\{ ( 3,9 ) \}\)
• D) \(\{ ( 3 , - 9 ) \}\)

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Definitions:

Family Intervention

A structured method of assistance where family members come together to address issues affecting one or more of their members, often related to mental health or substance abuse.

Autism Spectrum Disorder

A range of neurological and developmental disorders characterized by difficulties in social interaction and communication, along with restricted and repetitive behaviors.

Delinquent-Type Behaviors

Actions that violate social norms or laws, often performed by juveniles.

Repetitive Behaviors

Actions that are performed over and over again, often as a symptom of a neurodevelopmental disorder.