RRB NTPC · Question 35
Solve for 'a' : \(\dfrac{7}{a-2}=\dfrac{5}{a+4}\)
Show answer & explanation
Answer: (A) -19
Explanation
Cross-multiplying: 7(a + 4) = 5(a − 2), so 7a + 28 = 5a − 10, 2a = −38 and a = −19.
Railways PYQCBT 2 2017
RRB NTPC · Question 35
Answer: (A) -19
Cross-multiplying: 7(a + 4) = 5(a − 2), so 7a + 28 = 5a − 10, 2a = −38 and a = −19.