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1. 3x + y = 9 এবং 4x - y = 5 হলে, x ও y এর মান হবে যথাক্রমে ---
- A. 3, -2
- B. 3, -2
- C. 3, -2
- D. 3, -2
Answer: Option C
Explanation:
3x + y = 9......1
4x - y = 5.......2
Now,
1 + 2
= > 3x + y + 4x - y = 9 + 5
= >7x = 14
= >X = 14/7
So x = 2
Now we get from equation 1
3*2 + y = 9
= > y = 9 - 6
= > y = 3
Here x = 2 and y = 3
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