Question 12
Linear and Simultaneous EquationsGiven that x + y = 7 and 3x − y = 5, evaluate y/2 − 3.
- A.−1
- B.1
- C.3
- D.4
Show the answer and explanation
Answer: A (−1)
Explanation
Adding: 4x = 12, x = 3, so y = 4. Then 4/2 − 3 = −1.
Given that x + y = 7 and 3x − y = 5, evaluate y/2 − 3.
Answer: A (−1)
Adding: 4x = 12, x = 3, so y = 4. Then 4/2 − 3 = −1.