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1. 5xy+28x-2=0 এবং y=-4 হলে, 4x+y= কত?
- A. 3
- B. 3
- C. 3
- D. 3
Answer: Option C
Explanation:
5xy + 28x -2 = 0
বা, 5x(-4) + 28x - 2 = 0
বা, -20x+28x-2 = 0
বা, 8x-2 = 0
বা, 8x = 2
বা, x = 2/8
∴ x = 1/4
4x + y = 4.1/4+(-4)
= 1-4
= -3
(ANSWER) .
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