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1. 3x - 7y + 10 = 0 এবং y - 2x - 3 = 0 এর সমাধান-
- A. x = 1, y = -1
- B. x = 1, y = -1
- C. x = 1, y = -1
- D. x = 1, y = -1
Answer: Option D
Explanation:
3x - 7y + 10 = 0 ........(1)
y - 2x - 3 = 0
= > y = 2x + 3 .......(2)
(1) নং হতে, 3x - 7 (2x + 3) + 10 = 0
= > 3x - 14x - 21 + 10 = 0
= > - 11x = 11 x = - 1
(2) নং হতে, y = 2( - 1) + 3 = 1
x = - 1, y = 1
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