Use Cramer's Rule to Solve the System of Equations $x - 3 y = 21$

question 234

Multiple Choice

Use Cramer's rule to solve the system of equations. If D = 0, use another method to determine the solution set.
- $x - 3 y = 21$
$- 3 x - 4 y = 15$

• A) \(\{ ( 2 , - 5 ) \}\)
• B) Cramer's rule does not apply since \(D = 0 ; \varnothing\)
• C) \(\{ ( 3 , - 6 ) \}\)
• D) \(\{ ( - 3 , - 5 ) \}\)

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