Solve the System of Equations by the Substitution Method $\left\{ \begin{array} { l } - 3 y + 4 y = - 7 x + 2 ( x + 1 ) + 7 x - 1 \\5 ( x + y ) - x + y = 22\end{array} \right.$

question 50

Multiple Choice

Solve the system of equations by the substitution method.
- $\left\{ \begin{array} { l } - 3 y + 4 y = - 7 x + 2 ( x + 1 ) + 7 x - 1 \\5 ( x + y ) - x + y = 22\end{array} \right.$

• A) infinite number of solutions
• B) no solution
• C) \(( 3,1 )\)
• D) \(( 1,3 )\)

---

Definitions:

Learning By Observation

Learning by observation involves acquiring new behaviors, skills, or attitudes through watching others, also known as social learning or modeling.

Classical Conditioning

A learning process in psychology that involves creating an association between a naturally occurring stimulus and a previously neutral one.

Mere Exposure Effect

The mere exposure effect is a psychological phenomenon where people tend to develop a preference for things simply because they are familiar with them.

Classical Conditioning

A learning process that occurs through associations between an environmental stimulus and a naturally occurring stimulus.