Use Cramer's rule to solve the system of equations. 
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Speaking
The act of conveying thoughts, feelings, or information orally through the use of voice and language.
Acquisition
The process of gaining new knowledge, skills, behaviors, or possessions through various means.
Mathematical Abilities
The capacity to understand, analyze, and manipulate numerical and geometrical information efficiently.
Kaufman Assessment Battery for Children
A standardized test that assesses cognitive development and processing skills in children, focusing on both verbal and non-verbal abilities.
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Q84: Solve using substitution. [Hint: Substitute for y<sup>2</sup>
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