Use the Substitution Method to Solve the Following System $$\left\{ \begin{array} { c } 7 a + 9 b = 69 \\a = 21 - 5 b\end{array} \right.$$

question 44

Multiple Choice

Use the substitution method to solve the following system. If the equations of the system are dependent, or if the system is inconsistent, so indicate. $$\left\{ \begin{array} { c } 7 a + 9 b = 69 \\a = 21 - 5 b\end{array} \right.$$

• A) \(( 6,3 )\)
• B) \(( 6 , - 3 )\)
• C) \(( - 6,3 )\)
• D)The equations are dependent.
• E)The system is inconsistent.

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