Solve the System of Equations by the Substitution Method $$\begin{array} { l } x - 7 y = - 40 \\4 x - 8 y = - 20\end{array}$$

question 135

Multiple Choice

Solve the system of equations by the substitution method.
- $$\begin{array} { l } x - 7 y = - 40 \\4 x - 8 y = - 20\end{array}$$

• A) \(\{ ( - 9,8 ) \}\)
• B) \(\{ ( 8,8 ) \}\)
• C) \(\{ ( 9,7 ) \}\)
• D) \(\varnothing\)

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