Solve the system of equations below by the substitution method. 
Definitions:
Assertiveness
The quality of being self-assured and confident without being aggressive, capable of standing up for one's own rights in a respectful manner.
Supportiveness
Supportiveness refers to the quality of providing encouragement, feedback, assistance, and a positive environment that fosters growth and development in others.
Aggressiveness
A behavior characterized by being bold or assertive, often aiming to dominate or control a situation.
Uncertain
The state of having incomplete knowledge or information, making outcomes or future events unpredictable.
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