Solve the System of Equations by the Substitution Method $\begin{aligned}x + y & = 6 \\y & = 2 x\end{aligned}$

question 66

Multiple Choice

Solve the system of equations by the substitution method.
- $\begin{aligned}x + y & = 6 \\y & = 2 x\end{aligned}$

• A) \(\{ ( - 2,4 ) \}\)
• B) \(\{ ( 2 , - 4 ) \}\)
• C) \(\{ ( 2,4 ) \}\)
• D) \(\{ ( - 2 , - 4 ) \}\)

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The amount of testosterone, a primary male sex hormone, present in the body, which influences various bodily functions including muscle mass, hair growth, and sexual function.

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