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

question 52

Multiple Choice

Solve each system by using either the substitution or the elimination-by-addition method, whichever seems more appropriate. $$\left( \begin{array} { c } 3 x - y = 7 \\5 x + 10 y = 1\end{array} \right)$$

• A) \(\left( \frac { 71 } { 35 } , \frac { 32 } { 35 } \right)\)
• B) \(\left( - \frac { 71 } { 35 } , \frac { 32 } { 35 } \right)\)
• C) \(\left( \frac { 71 } { 35 } , - \frac { 32 } { 35 } \right)\)
• D) no solutions
• E) infinitely many solutions

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Definitions:

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Sale

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Equity Method

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