Solve the System by Using Either the Substitution Method or the Elimination-By-Addition

question 172

Multiple Choice

Solve the system by using either the substitution method or the elimination-by-addition method, whichever seems more appropriate. $\left( \begin{array} { lll } y &=& 3 x \\0.31 x &+& 0.09 y &= &232\end{array} \right)$

• A) (600, 1,800)
• B) (400, 1,200)
• C) dependent
• D) inconsistent

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