Solve the System by Substitution $$\begin{array} { c } x - 3 y = 0 \\4 x - 3 y = - 18\end{array}$$

question 145

Multiple Choice

Solve the system by substitution.
- $$\begin{array} { c } x - 3 y = 0 \\4 x - 3 y = - 18\end{array}$$

• A) \(\{ ( - 6 , - 2 ) \}\)
• B) \(\{ ( - 5 , - 3 ) \}\)
• C) \(\varnothing\)
• D) \(\{ ( 2 , - 6 ) \}\)

---

Definitions:

Urine

A liquid waste product of the body that is excreted by the kidneys and stored in the bladder until it exits the body through the urethra.

Urine Culture

A laboratory test that identifies bacteria in the urine to diagnose urinary tract infections.

Sensitivity Test

A laboratory test used to determine the effectiveness of antibiotics or other antimicrobial agents against bacteria or other pathogens.

First Morning Urine

The first urination after waking up, often used in medical testing as it is more concentrated and can provide more accurate results.