Solve the System by Substitution,if Possible $$\left\{ \begin{array} { l } y = 7 x - 21 \\9 x - y = 29\end{array} \right.$$

question 16

Multiple Choice

Solve the system by substitution,if possible.​ $$\left\{ \begin{array} { l } y = 7 x - 21 \\9 x - y = 29\end{array} \right.$$ ​

• A)(11,-2)
• B)(7,4)
• C)(-3,12)
• D)(4,7)
• E)No solutions

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