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

question 18

Multiple Choice

Solve the system by using either the substitution method or the elimination-by-addition method, whichever seems more appropriate. $$\left( \begin{array} { l } \frac { 1 } { 4 } x - \frac { 1 } { 20 } y = 10 \\\frac { 1 } { 4 } x + \frac { 1 } { 8 } y = - 11\end{array} \right)$$

• A)(18, -122)
• B)(16, -120)
• C)(18, -120)
• D)dependent
• E)inconsistent

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