2xy + y = 14 এবং x = 3 হলে 2y + x = কত?
A
5
B
6
C
7
D
8
Correct Answer: 7
2xy + y = 14, x = 3বা, 2.3.y + y = 14বা, y(6 + 1) = 14বা, y = 147 = 2∴2y + x = 2×2 + 3 = 7