যদি 2xy + y = 14 এবং x = 3 হয়, তাহলে 2y+x = কত?
Solution
Correct Answer: Option C
2xy+y = 14
বা,2.3.y+y = 14
বা, 7y = 14
বা, \(y = \frac{{14}}{7} = 2\)
2y + x = 2\( \times \) 2 + 3 = 7
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