Question 14
Linear and Simultaneous EquationsIf a = 1, b = 3, solve for x in the equation a/(a − x) = b/(x − b)
- A.4/3
- B.2/3
- C.3/2
- D.3/4
Show the answer and explanation
Answer: C (3/2)
Explanation
Substitute: 1/(1 − x) = 3/(x − 3). Cross-multiply: x − 3 = 3 − 3x, so 4x = 6 and x = 3/2.