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Algebra
Question

Solve the system by the substitution method. \( \l...

Solve the system by the substitution method. \( \left\{ \begin{array} { l } { x + y = - 3 } \\ { y = - 2 x } \end{array} \right. \) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. 

A. There is exactly one solution. The solution set is \( \{ \} \) . (Simplify your answer. Type an ordered pair.) B. There are infinitely many solutions. The solution set is \( \{ ( x , y ) | x + y = - 3 \} \) or \( \{ ( x , y ) | y = - 2 x \} \) .

 C. The solution set is \( \varnothing \) . 

Answer

\(x= 3,\space y= -6\)

Option A is correct.

Solution
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