Solve the System of Equations by Using the Substitution Method $$\begin{array} { l } 3 ( x + y ) = - 7 - y \\9 x - 1 = 8 + 3 y\end{array}$$

question 183

Multiple Choice

Solve the system of equations by using the substitution method.
- $$\begin{array} { l } 3 ( x + y ) = - 7 - y \\9 x - 1 = 8 + 3 y\end{array}$$

• A) \(\left\{ \left( - \frac { 7 } { 3 } , 0 \right) \right\}\)
• B) \(\left\{ \left( - \frac { 7 } { 3 } , - \frac { 1 } { 3 } \right) \right\}\)
• C) \(\left\{ \left( \frac { 1 } { 3 } , - 2 \right) \right\}\)
• D) \(\left\{ \left( 0 , - \frac { 1 } { 3 } \right) \right\}\)

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Definitions:

Spacing Studying

The practice of distributing learning sessions or practice over time, rather than condensing them into short blocks, to improve long-term memory retention.

Hindsight Bias

The tendency to believe, after an event has occurred, that one would have predicted or expected the event, often referred to as the "I-knew-it-all-along" phenomenon.

Erratic Memory

Memory function characterized by inconsistent and unpredictable recall ability, which can be influenced by various factors.

Mediocre Performance

An average or below-average level of quality or achievement, typically failing to stand out or excel.