defence exam CISF Constable Driver 2025 Quantitative Aptitude Algebra Linear Equation in 2 or more Variables
The relation between a, b, c and d, for which the equation 4ax + 3by = c and 3cx + 2dy = a have a unique solution, is
1
4a2d ≠ 3bc
2
3ca = 4bd
3
8ad ≠ 9bc
4
3bc = 4ad