Question 21
Linear and Simultaneous EquationsSolve for y in the equations: 2x − 3y = 22; 3x + 2y = 7
- A.−5
- B.−4
- C.4
- D.5
Show the answer and explanation
Answer: B (−4)
Explanation
Eliminate y: 4x − 6y = 44 and 9x + 6y = 21 add to 13x = 65, x = 5. Then 15 + 2y = 7, y = −4.