Find the Solution to the System of Equations by Substitution $$\begin{array} { l } x + 4 y = 7 \\- 3 x - 12 y = - 21\end{array}$$

question 60

Multiple Choice

Find the solution to the system of equations by substitution.
- $$\begin{array} { l } x + 4 y = 7 \\- 3 x - 12 y = - 21\end{array}$$

• A)(7, 0)
• B)(0, 0)
• C)infinite number of solutions
• D)no solution

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