alleryযদি a + b = 10 এবং a - b = 4 হয়, তবে a-এর মান কত?
A6
B8
C7
D3
Answer & Solution
Correct answer: C. 7
উভয় সমীকরণ যোগ করে পাই: 2a = 14 => a = 7।
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